| 单词 | general relativity |
| 例句 | This problem in combining general relativity and the uncertainty principle had been suspected for some time, but was finally confirmed by detailed calculations in 1972. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z This property really upset Einstein, who had thought that general relativity wouldn’t allow time travel. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z Just as zero punches a hole in the smooth sheet of general relativity, zero smooths and spreads out the sharp point charge of the electron, covering it in a fog. Zero: The Biography of a Dangerous Idea 2000-02-07T00:00:00Z A consistent theory of how gravity affects light did not come along until Einstein proposed general relativity in 1915. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z According to quantum mechanics and general relativity, the power of zero is infinite, so it’s no surprise that people are hoping to tap its potential. Zero: The Biography of a Dangerous Idea 2000-02-07T00:00:00Z A necessary first step, therefore, is to combine general relativity with the uncertainty principle. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z The idea of radiation from black holes was the first example of a prediction that depended in an essential way on both the great theories of this century, general relativity and quantum mechanics. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z A wormhole is a paradox caused by a zero in the equations of general relativity. Zero: The Biography of a Dangerous Idea 2000-02-07T00:00:00Z In previous chapters I have described general relativity, the partial theory of gravity, and the partial theories that govern the weak, the strong, and the electromagnetic forces. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z However, as we have seen, classical general relativity predicts its own downfall. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z The equations of general relativity cannot deal with the sharpness of zero. Zero: The Biography of a Dangerous Idea 2000-02-07T00:00:00Z So general relativity predicts that light should be bent by gravitational fields. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z Indeed, this used to be the main argument of opponents of black holes: how could one believe in objects for which the only evidence was calculations based on the dubious theory of general relativity? A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z According to the singularity theorems of classical general relativity, there would still have been a big bang singularity. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z In the classical theory of general relativity one cannot predict how the universe would have begun because all the known laws of science would have broken down at the big bang singularity. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z According to the equations of general relativity, the universe was unstable. Zero: The Biography of a Dangerous Idea 2000-02-07T00:00:00Z However, other more reasonable space-times that are allowed by general relativity and which permit travel into the past have since been found. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z Banishing zero also solves the infinity problems in general relativity. Zero: The Biography of a Dangerous Idea 2000-02-07T00:00:00Z A black hole is a zero in the equations of general relativity; the energy of the vacuum is a zero in the mathematics of quantum theory. Zero: The Biography of a Dangerous Idea 2000-02-07T00:00:00Z In recent years the even smaller deviations of the orbits of the other planets from the Newtonian predictions have been measured by radar and found to agree with the predictions of general relativity. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z The first indication that the laws of physics might really allow people to travel in time came in 1949 when Kurt Godel discovered a new space-time allowed by general relativity. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z In attempting to incorporate the uncertainty principle into general relativity, one has only two quantities that can be adjusted: the strength of gravity and the value of the cosmological constant. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z In Einstein’s theory of general relativity, a zero became a black hole, a monstrous star that swallows entire suns. Zero: The Biography of a Dangerous Idea 2000-02-07T00:00:00Z The main difficulty in finding a theory that unifies gravity with the other forces is that general relativity is a “classical” theory; that is, it does not incorporate the uncertainty principle of quantum mechanics. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z At the singularity, general relativity and all other physical laws would break down: one couldn’t predict what would come out of the singularity. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z However, it did not resolve the crucial question: Does general relativity predict that our universe should have had a big bang, a beginning of time? A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z Another prediction of general relativity is that time should appear to run slower near a massive body like the earth. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z This singularity makes no sense in quantum mechanics or in general relativity. Zero: The Biography of a Dangerous Idea 2000-02-07T00:00:00Z In fact, the orbits of the planets predicted by general relativity are almost exactly the same as those predicted by the Newtonian theory of gravity. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z If one ignored the predictions of general relativity, the position that one calculated would be wrong by several miles! A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z Godel got to know about general relativity when he and Einstein spent their later years at the Institute for Advanced Study in Princeton. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z Before 1970, my research on general relativity had concentrated mainly on the question of whether or not there had been a big bang singularity. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z We do not yet have a complete consistent theory that unifies general relativity and quantum mechanics, but we do know a number of the features it should have. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z In general relativity, bodies always follow straight lines in four-dimensional space-time, but they nevertheless appear to us to move along curved paths in our three- dimensional space. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z The only way out was to “correct” his equations of general relativity to stave off the impending destruction. Zero: The Biography of a Dangerous Idea 2000-02-07T00:00:00Z We shall see later that when one combines general relativity with the uncertainty principle of quantum mechanics, it is possible for both space and time to be finite without any edges or boundaries. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z In the classical theory of general relativity, there are many different possible curved space-times, each corresponding to a different initial state of the universe. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z The universe of general relativity is a smooth rubber sheet. Zero: The Biography of a Dangerous Idea 2000-02-07T00:00:00Z The clock at the bottom, which was nearer the earth, was found to run slower, in exact agreement with general relativity. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z However, we still use Newton’s theory for all practical purposes because the difference between its predictions and those of general relativity is very small in the situations that we normally deal with. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z This was the first indication that quantum mechanics might remove the singularities that were predicted by general relativity. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z It neatly illustrates the theory of general relativity without Einstein’s equations. City of Science, Bending Minds and Matter in Its Debut at Lehman College 2016-05-05T04:00:00Z Later, Einstein conjectured, with a highly mathematical theory called general relativity, that gravity also affects the rate of ticking of clocks: A clock in strong gravity ticks more slowly than one in weak gravity. Benedict Cumberbatch Meets Albert Einstein in Carlo Rovelli’s New Audiobook 2018-05-14T04:00:00Z Ever since Einstein unveiled his theory of general relativity, scientists have been sussing out the deep connection between gravity and time. Review | Eyehategod’s high-gravity metal can connect you to the heavens 2021-03-12T05:00:00Z Examples include Einstein's equation of general relativity, Dirac's equation for the electron and the Lagrangian at the heart of the standard model of particle physics. The beauty of the Higgs boson 2012-08-04T23:05:33Z In December 1915, while serving on the Russian front, the German astronomer and mathematician Karl Schwarzschild sent a letter to Albert Einstein that contained the first precise solution to the equations of general relativity. The Ecstasy of Scientific Discovery, and Its Agonizing Price 2021-09-24T04:00:00Z It’s true that “Constellations” makes fluent and casual use of the notions of string theory, quantum cosmological modeling and general relativity, among others. ArtsBeat: London Theater Journal: Big Ideas in Small Spaces 2012-01-31T16:09:34Z As for looking down from a mountain into a valley and saying thats what general relativity is like, well I just hope that isnt how you actually teach. Brian Cox digested: A summary of Thursday's live Q&A session 2011-03-25T17:58:00Z According to Einstein’s general relativity, massive objects warp spacetime so that anything traveling through it, including light, takes a curving path. In a “rainbow” universe, time may have no beginning 2013-12-10T07:15:00Z Regardless, the point is that Kurt Gödel actually discovered mathematical solutions to Einstein's equations that would allow for a form of time travel in a universe that was governed by general relativity. Charles Yu's top 10 time travel books 2010-10-20T09:29:00Z Translated by Adrian Nathan West, the book takes the stories of real scientific and mathematical breakthroughs — such as Albert Einstein’s equation for general relativity — and uses them to muse about humanity’s destructive power. French Authors Lead International Booker Prize Shortlist 2021-04-22T04:00:00Z Albert Einstein's equation of general relativity is a thing of dazzling beauty. The beauty of the Higgs boson 2012-08-04T23:05:33Z By contrast, Albert Einstein's theories of special and general relativity seemed completely remote from "experience" — yet experiments have repeatedly confirmed them. Higgs boson: the human urge to visualise the particle is irresistible 2012-07-06T13:00:02Z They think that this book is a primer on general relativity and cosmology. “The World Is, of Course, Insane”: An Interview with Errol Morris 2019-10-28T04:00:00Z “That allows for better tests of general relativity and better characterization of the black holes’ parameters,” González says. Black holes are colliding: Scientists confirm more ripples in spacetime 2016-06-16T04:00:00Z The first piece, marking the centennial of the theory of general relativity, is orderly and mostly white; the second, whose title means “brain songs,” is darker and more agitated. In the galleries: The roots of these gardens run deep 2016-02-03T05:00:00Z In The Theory of Everything, Jane Hawking uses a pea and a potato to explain the difference between quantum theory and general relativity, while her husband’s friends explain Hawking Radiation with beers and crisps. Genius by numbers: why Hollywood maths movies don't add up 2016-04-06T04:00:00Z And that is how Einstein’s general relativity is. Tell Us 5 Things About Your Book: ‘Why,’ About the Science of Curiosity 2017-07-16T04:00:00Z The book consists of illustrations of what Dr. Thorne likes to call the “space-time storms” predicted by general relativity, Einstein’s theory of gravity, alternating with his own explanations of the physics, which appear in verse. ‘Vortenses’ and the Storms of Space-Time 2023-11-07T05:00:00Z This observation suggests that some theory of gravity other than general relativity might conceivably be at play, the authors argue. A Possible Crisis in the Cosmos Could Lead to a New Understanding of the Universe 2023-10-30T04:00:00Z “There is no evidence for deviation from general relativity,” Hees says. ‘Modified’ Gravity May Make Planet Nine Disappear 2023-10-25T04:00:00Z Einstein’s general relativity breaks down at quantum scales, suggesting it is incomplete. What Happens if You Drop Antimatter? New Gravitational Test Sees First Fall 2023-09-27T04:00:00Z Quantum theory typically deals with the universe in tiny chunks, or quanta, while general relativity takes the cosmos to be continuous even at the smallest scales. Will Scientists Ever Find a Theory of Everything? 2023-08-19T04:00:00Z Oppenheimer’s climactic third paper, written with his student Hartland Snyder, explores the implications of general relativity on the universe’s most massive stars. Oppenheimer Almost Discovered Black Holes Before He Became ‘Destroyer of Worlds’ 2023-07-21T04:00:00Z “Exciting if true—but changing general relativity is a high price to pay.” A Possible Crisis in the Cosmos Could Lead to a New Understanding of the Universe 2023-10-30T04:00:00Z Scientists are hopeful that with Euclid’s data, they’ll be able to test if Albert Einstein’s theory of general relativity works differently on cosmological scales. How to Watch SpaceX Launch the Euclid Mission to Study the Dark Universe 2023-07-01T04:00:00Z Scientists said that, so far, the results were consistent with Albert Einstein’s theory of general relativity, which describes how matter and energy warp space-time to create what we call gravity. The Cosmos Is Thrumming With Gravitational Waves, Astronomers Find 2023-06-28T04:00:00Z He was attempting to fix a problem with his theory of gravity, general relativity. Euclid telescope to seek source of dark energy—the biggest mystery in the universe 2023-06-21T04:00:00Z Thorne says that the paper is particularly staggering, given contemporary work from an even more famous physicist—the one who developed general relativity in the first place. Oppenheimer Almost Discovered Black Holes Before He Became ‘Destroyer of Worlds’ 2023-07-21T04:00:00Z According to Einstein's theory of general relativity, mass and energy warp the shape of space and time. Gravitational wave detector LIGO is back online after 3 years of upgrades 2023-05-24T04:00:00Z Which means that looking for deviations from general relativity in the high-fidelity observations of gravitational waves could rewrite some of our fundamental understandings of space and time. Six Gravitational-Wave Breakthroughs Scientists Can’t Wait to See 2023-05-22T04:00:00Z By the middle of the 20th century, they had come up with two theories that serve as the pillars of modern physics: quantum mechanics and general relativity. Stanley Deser, Whose Ideas on Gravity Help Explain the Universe, Dies at 92 2023-05-08T04:00:00Z If the growth of these structures deviates from the predictions of general relativity, it could indicate that Einstein’s theory itself needs revision, eliminating the need for dark energy. Euclid telescope to seek source of dark energy—the biggest mystery in the universe 2023-06-21T04:00:00Z From a cosmological perspective, they can use Albert Einstein's equations of general relativity to calculate how much energy is needed to explain the fact that the universe is expanding at an accelerated rate. How Much Does ‘Nothing’ Weigh? 2023-04-29T04:00:00Z Scientists have come up with a few ways it might be possible, and they have been aware of time travel paradoxes in general relativity for decades. Is Time Travel Possible? 2023-04-26T04:00:00Z One reason is that it seems to conflict with one of our other theories, general relativity, used to describe gravity. Quantum Physics Falls Apart without Imaginary Numbers 2023-04-24T04:00:00Z Albert Einstein’s theory of general relativity had elegantly captured how mass and gravity bend the fabric of space-time. Stanley Deser, Whose Ideas on Gravity Help Explain the Universe, Dies at 92 2023-05-08T04:00:00Z Dr. Gopnik compared the theory of mind of large language models to her own understanding of general relativity. Can a Machine Know That We Know What It Knows? 2023-03-27T04:00:00Z At first, the scientific community was delighted: it seemed that general relativity's constant was the result of the energy of virtual particles in empty space. How Much Does ‘Nothing’ Weigh? 2023-04-29T04:00:00Z In many cases, it is needed to hold open a wormhole—a tunnel in spacetime predicted by general relativity that connects one point in the cosmos to another. Is Time Travel Possible? 2023-04-26T04:00:00Z “What they are proposing makes no sense to me,” says Robert Wald, a theoretical physicist at the University of Chicago who specializes in Einstein’s theory of general relativity, the standard understanding of gravity. Dark energy from supermassive black holes? Physicists spar over radical idea 2023-02-26T05:00:00Z The ADM formalism offered additional benefit: It made general relativity equations amenable to computer simulations, enabling scientists to probe phenomena like the space-bending pull of black holes and the universe-shaking explosions when stars collide. Stanley Deser, Whose Ideas on Gravity Help Explain the Universe, Dies at 92 2023-05-08T04:00:00Z From the perspective of cosmology, the Big Bang is the origin of space and time, at least from the point of view of Einstein’s general relativity. Where is Physics Headed (and How Soon Do We Get There)? 2023-01-24T05:00:00Z If the measurements match expectations and show that virtual particles interact gravitationally just like ordinary matter, then we will know for sure that vacuum fluctuations must affect Einstein's general relativity equations. How Much Does ‘Nothing’ Weigh? 2023-04-29T04:00:00Z Albert Einstein’s theory of general relativity says gravity arises when mass or energy warp spacetime, and in a black hole the energy in the stretched out spacetime itself sustains the warping. It just got harder to question the existence of black holes 2023-01-04T05:00:00Z According to general relativity, a black hole Such peculiar beasts are thought to emerge when massive stars collapse to an infinitesimal point, leaving just their gravitational fields behind. Dark energy from supermassive black holes? Physicists spar over radical idea 2023-02-26T05:00:00Z While Dr. Deser was an expert on gravity and general relativity, he was not infallible. Stanley Deser, Whose Ideas on Gravity Help Explain the Universe, Dies at 92 2023-05-08T04:00:00Z “They’re learning that they could do this experiment,” he said, adding: “The really interesting thing here is the possibility of analyzing purely quantum phenomena using general relativity, and who knows where that’s going to go.” Physicists Create ‘the Smallest, Crummiest Wormhole You Can Imagine’ 2022-11-30T05:00:00Z If that were to happen, the idea could help develop a theory of quantum gravity, one that would combine Einstein’s general relativity with quantum mechanics. Is Our Universe a Hologram? Physicists Debate Famous Idea on Its 25th Anniversary 2022-11-30T05:00:00Z Black holes are objects so dense that, according to Einstein’s theory of general relativity, not even light can escape them. Astronomers Find a Black Hole in Our Cosmic Back Yard 2022-11-05T04:00:00Z On one side is the Einstein who in 1915 conceived general relativity, which describes gravity as the warping of space-time by matter and energy. Black Holes May Hide a Mind-Bending Secret About Our Universe 2022-10-10T04:00:00Z Theoretical physicist and philosopher Sean Carroll levels up the standard popular-science book by explaining concepts such as mechanics and general relativity without dumbing them down—giving readers what he calls “the real stuff.” Octavia E. Butler’s Legacy of Time Travel 2022-09-18T04:00:00Z Scientists have demonstrated that Einstein's theory of general relativity is correct to a remarkable degree of accuracy, despite having been around for more than a century. Einstein’s Greatest Theory Just Passed Its Most Rigorous Test Yet 2022-09-15T04:00:00Z Without spacetime, Einstein’s general relativity is not relevant at this stage, in much the same way that the equations of hydrodynamics don’t apply to a gas of water molecules. Is Our Universe a Hologram? Physicists Debate Famous Idea on Its 25th Anniversary 2022-11-30T05:00:00Z A pillar of Albert Einstein’s theory of general relativity—and a staple of middle school science class demonstrations—has passed its most stringent test yet. Strictest test yet of general relativity confirms feathers and bowling balls really do fall at the same rate 2022-09-14T04:00:00Z You can also use general relativity to address the twin paradox and, according to general relativity, the astronaut will age less. College Physics for AP Courses 2015-08-12T00:00:00Z This observation not only confirms the theory of the origin of short gamma-ray bursts, but also is a spectacular demonstration of the validity of Einstein’s theory of general relativity. Astronomy 2016-10-13T00:00:00Z As well as placing constraints on deviations in the weak equivalence principle, the findings also disfavor any deviations in Einstein's 1915 theory of gravity, general relativity, as a whole. Einstein’s Greatest Theory Just Passed Its Most Rigorous Test Yet 2022-09-15T04:00:00Z These patches are physically disconnected from each other: going from patch A to patch B isn’t possible without leaving both A and B; however, each individual patch can be described using general relativity. Is Our Universe a Hologram? Physicists Debate Famous Idea on Its 25th Anniversary 2022-11-30T05:00:00Z Such work could help physicists shore up holes in Einstein’s theory of general relativity, which many physicists believe is incomplete, Lim says. Strictest test yet of general relativity confirms feathers and bowling balls really do fall at the same rate 2022-09-14T04:00:00Z Both special and general relativity had to be taken into account, since gravity and accelerations were involved as well as relative motion. College Physics for AP Courses 2015-08-12T00:00:00Z The stars seen near the Sun were indeed displaced, and to the accuracy of the measurements, which was about 20%, the shifts were consistent with the predictions of general relativity. Astronomy 2016-10-13T00:00:00Z Scientists continue to look for such deviations because general relativity, the best description we have of gravity, doesn't jive with quantum physics, the best model we have of reality at incomprehensibly small scales. Einstein’s Greatest Theory Just Passed Its Most Rigorous Test Yet 2022-09-15T04:00:00Z Physicists hope that such insights will get them to a theory of quantum gravity for our own universe, which would combine general relativity with quantum mechanics. Is Our Universe a Hologram? Physicists Debate Famous Idea on Its 25th Anniversary 2022-11-30T05:00:00Z It’s difficult to reconcile general relativity with quantum mechanics, for example. Strictest test yet of general relativity confirms feathers and bowling balls really do fall at the same rate 2022-09-14T04:00:00Z Although his other contributions to theoretical physics were also noted in that award, special and general relativity were not fully recognized in spite of having been partially verified by experiment by 1921. College Physics for AP Courses 2015-08-12T00:00:00Z These are only a few examples of tests that have confirmed the predictions of general relativity. Astronomy 2016-10-13T00:00:00Z No sign of deviation, then, means still no hint of extensions to general relativity waiting to be found that could bridge the gap to quantum physics. Einstein’s Greatest Theory Just Passed Its Most Rigorous Test Yet 2022-09-15T04:00:00Z What emerges is a self-consistent picture that lets a black hole retain its regular structure as predicted by general relativity, albeit with the presence of an implicit though powerful nonlocality. How the Inside of a Black Hole Is Secretly on the Outside 2022-08-22T04:00:00Z Rodrigues adds that scientists do not fully understand how to square general relativity with phenomena such as black holes, where gravitational forces are so strong they prevent light from escaping. Strictest test yet of general relativity confirms feathers and bowling balls really do fall at the same rate 2022-09-14T04:00:00Z Einstein's theory of general relativity got its first verification in 1919 when starlight passing near the Sun was observed during a solar eclipse. College Physics for AP Courses 2015-08-12T00:00:00Z We will examine this situation from two perspectives: first from a pre-Einstein point of view, and then with the aid of general relativity. Astronomy 2016-10-13T00:00:00Z They awkwardly bridge the theories of quantum mechanics and general relativity, exposing deep weaknesses in our understanding of nature. Black Hole Mysteries Solved 2022-08-16T04:00:00Z Dr. Bardeen was an expert on unraveling the equations of Einstein’s theory of general relativity. James Bardeen, an Expert on Unraveling Einstein’s Equations, Dies at 83 2022-07-03T04:00:00Z Theoretical physicists have hit on a new way to test Albert Einstein’s theory of gravity, or general relativity, and—just maybe—probe the distant universe for tiny, hard to detect objects. Gravitational wave radar could probe deep space for tiny stellar objects 2022-06-23T04:00:00Z The idea of a black hole was very quickly reincarnated in 1916 after Einstein's theory of general relativity was published. College Physics for AP Courses 2015-08-12T00:00:00Z His paper on the theory of event horizons was among the last things he finished as he was dying; it was the first exact solution to Einstein’s equations of general relativity. Astronomy 2016-10-13T00:00:00Z “If you ask it how to unify quantum theory with general relativity, it has good ideas. It's the best research assistant I've ever had!” The Google engineer who thinks the company’s AI has come to life 2022-06-11T04:00:00Z Ozel expressed mild disappointment that the image did not generate a “crack” in Albert Einstein’s theory of general relativity, which describes gravity as a warping of space and time. Supermassive black hole seen at the center of our galaxy 2022-05-11T04:00:00Z If general relativity is correct, the echo has to exist at some level, says Craig Copi, a theoretical physicist at Case Western Reserve University and lead author on the paper. Gravitational wave radar could probe deep space for tiny stellar objects 2022-06-23T04:00:00Z In fact, since general relativity implies that matter creates the space in which it exists, there is a special symmetry to a flat universe. College Physics for AP Courses 2015-08-12T00:00:00Z According to general relativity, this system of stellar corpses should be radiating energy in the form of gravitational waves at a high enough rate to cause the pulsar and its companion to spiral closer together. Astronomy 2016-10-13T00:00:00Z Indeed, the pictures provide the strongest evidence to date for Einstein’s theory of general relativity. Astronomers capture first image of supermassive black hole at our galaxy's center 2022-05-12T04:00:00Z “This is an extraordinary validation of general relativity,” said Michael Johnson, an astrophysicist at the Harvard-Smithsonian Center for Astrophysics. Supermassive black hole seen at the center of our galaxy 2022-05-11T04:00:00Z According to general relativity, massive objects such as stars and planets warp spacetime to create the effect we call gravity. Gravitational wave radar could probe deep space for tiny stellar objects 2022-06-23T04:00:00Z One unconfirmed connection between general relativity and quantum mechanics is the prediction of characteristic radiation from just outside black holes. College Physics for AP Courses 2015-08-12T00:00:00Z Einstein proposed the equivalence principle as the foundation of the theory of general relativity. Astronomy 2016-10-13T00:00:00Z Yet the similarity of the two images—bright rings of gas trapped in death spirals around these ultimate sinkholes—demonstrates that Albert Einstein’s theory of gravity, general relativity, works the same at all scales. Shadow of Milky Way’s giant black hole revealed by astronomers 2022-05-12T04:00:00Z Albert Einstein’s theory of general relativity, for example, predicts that time moves more slowly when it is near a massive body, such as a planet, because it is slowed by gravity’s pull. Get Ready For the New, Improved Second 2022-04-25T04:00:00Z Using general relativity, they calculate that the gravitational waves scattering off the object can reproduce the signal coming straight from the source, they report this week in Physical Review Letters. Gravitational wave radar could probe deep space for tiny stellar objects 2022-06-23T04:00:00Z Einstein developed general relativity to deal with accelerated frames and with gravity, a prime source of acceleration. College Physics for AP Courses 2015-08-12T00:00:00Z So, when we wrote that the theory of general relativity was Einstein’s work, you may have worried just a bit, convinced that anything Einstein did must be beyond your understanding. Astronomy 2016-10-13T00:00:00Z But Einstein’s theory of general relativity, which describes how gravity bends space, offers a handy workaround. Hubble Space Telescope Spots Earliest and Farthest Star Known 2022-03-30T04:00:00Z Then they thought about the theory of general relativity. Get Ready For the New, Improved Second 2022-04-25T04:00:00Z Some physicists have calculated that if general relativity is modified in certain ways by quantum mechanics, then the tail end of the signal from the merger of two black holes should exhibit a pulsing reverberation. Gravitational wave radar could probe deep space for tiny stellar objects 2022-06-23T04:00:00Z Some important conceptual aspects of general relativity are discussed in General Relativity and Quantum Gravity of this course. College Physics for AP Courses 2015-08-12T00:00:00Z But the minute we use light in our experiments, we are led to some very disturbing conclusions—and it is these conclusions that lead us to general relativity and a new view of gravity. Astronomy 2016-10-13T00:00:00Z The "yes hair theorem" claims to resolve the paradox by bridging the gap between general relativity and quantum mechanics. Scientists claim hairy black holes explain Hawking paradox 2022-03-17T04:00:00Z The first method compares two models: one based purely on general relativity, with no postmerger echoes or signals, and another that includes stimulated Hawking radiation. Could Echoes from Colliding Black Holes Prove Stephen Hawking’s Greatest Prediction? 2022-01-26T05:00:00Z Physicists’ best theory of gravity is general relativity, Albert Einstein’s famous conception of how matter warps space and time. What Is Spacetime Really Made Of? 2022-01-18T05:00:00Z When we talk of black holes or the unification of forces, we are actually discussing aspects of general relativity and quantum gravity. College Physics for AP Courses 2015-08-12T00:00:00Z Einstein calculated from general relativity theory that starlight just grazing the Sun’s surface should be deflected by an angle of 1.75 arcsec. Astronomy 2016-10-13T00:00:00Z "One of the consequences of the Hawking paradox was that general relativity and quantum mechanics was incompatible. What we are finding is that they are very much compatible." Scientists claim hairy black holes explain Hawking paradox 2022-03-17T04:00:00Z “That … in general relativity, can be understood, actually, as the effect of space-time curvature,” Roura told Space.com, referring to one of Albert Einstein’s most famous theories. In a First, an ‘Atomic Fountain’ Has Measured the Curvature of Spacetime 2022-01-17T05:00:00Z Ask general relativity what happens in the context of quantum physics, and you’ll get contradictory answers, with untamed infinities breaking loose across your calculations. What Is Spacetime Really Made Of? 2022-01-18T05:00:00Z Einstein's theory of general relativity describes all types of relative motion including accelerated motion and the effects of gravity. College Physics for AP Courses 2015-08-12T00:00:00Z The observed effect matched the predictions of general relativity to within a few parts in 100,000. Astronomy 2016-10-13T00:00:00Z “This is a really impressive suite of tests for general relativity—which of course passes,” says Scott Ransom of the U.S. Double pulsar data helps Einstein’s theory of gravity pass toughest test yet 2021-12-14T05:00:00Z In 1915, Einstein succeeded in using general relativity to explain how the Sun’s gravity is responsible for the peculiarities of Mercury’s orbit. News at a glance: Disappointing COVID-19 pills, an African telescope, and ‘race’ in genetics papers 2021-12-01T05:00:00Z While quantum physics treats space and time as immutable, general relativity warps them for breakfast. What Is Spacetime Really Made Of? 2022-01-18T05:00:00Z Many aspects of general relativity have been verified experimentally, some of which are better than science fiction in that they are bizarre but true. College Physics for AP Courses 2015-08-12T00:00:00Z According to general relativity, the geometry of spacetime depends on where matter is located. Astronomy 2016-10-13T00:00:00Z Since its discovery in 2003, the stellar duo has become astronomers’ best laboratory for testing general relativity. Double pulsar data helps Einstein’s theory of gravity pass toughest test yet 2021-12-14T05:00:00Z Einstein later reworked the calculations and published the theory of general relativity under only his name in November 1915. Rare Einstein manuscript that ‘almost miraculously’ survived sold for more than $13 million in Paris auction 2021-11-22T05:00:00Z In loop quantum gravity, space and time are not smooth and continuous the way they are in general relativity—instead they are made of discrete components, what Ashtekar calls “chunks or atoms of spacetime.” What Is Spacetime Really Made Of? 2022-01-18T05:00:00Z Quantum gravity is the theory that deals with particle exchange of gravitons as the mechanism for the force, and with extreme conditions where quantum mechanics and general relativity must both be used. College Physics for AP Courses 2015-08-12T00:00:00Z What if general relativity does not have many practical applications? Astronomy 2016-10-13T00:00:00Z In total, the team says, general relativity agrees with the observations to a level of at least 99.99%. Double pulsar data helps Einstein’s theory of gravity pass toughest test yet 2021-12-14T05:00:00Z The discovery of such a force could potentially resolve some of the biggest open questions in physics today, from the nature of dark energy to the seemingly irreconcilable differences between quantum mechanics and general relativity. New Universal Force Tested by Blasting Neutrons through Crystal 2021-10-12T04:00:00Z Because quantum physics and general relativity are both so phenomenally accurate, quantum gravity is needed only to describe extreme situations, when enormous masses are stuffed into unfathomably tiny spaces. What Is Spacetime Really Made Of? 2022-01-18T05:00:00Z By 1916, he had laid the foundation of general relativity, again almost on his own. College Physics for AP Courses 2015-08-12T00:00:00Z As Albert Einstein showed in his theory of general relativity, the presence of mass bends the surrounding fabric of spacetime. Astronomy 2016-10-13T00:00:00Z Although confirming general relativity is satisfying, researchers want to find a chink in its armor one day. Double pulsar data helps Einstein’s theory of gravity pass toughest test yet 2021-12-14T05:00:00Z It will also try to perform a test of Einstein’s theory of general relativity while enduring temperatures higher than 660 Fahrenheit. Spacecraft reveals rare images of Mercury’s craters after a ‘flawless’ flyby 2021-10-02T04:00:00Z In other words, these sorts of singularity-revealing instabilities should be impossible in our universe’s three dimensions as described by general relativity. Singularities Can Exist Outside Black Holes—In Other Universes 2021-08-23T04:00:00Z There are several current forefront efforts related to general relativity. College Physics for AP Courses 2015-08-12T00:00:00Z When the universe was that young, its density was so high that the theory of general relativity is not adequate to describe it, and even the concept of time breaks down. Astronomy 2016-10-13T00:00:00Z Science has already yielded lots of answers, including the theory of evolution, the genetic code, quantum mechanics, general relativity and the big bang theory. What Is a Question? 2021-08-07T04:00:00Z "Observing light bent around the black hole confirms a key prediction of general relativity." Thanks to a gravitational trick, astronomers observed light from behind a black hole 2021-07-29T04:00:00Z “We didn’t understand how to simulate general relativity and hence black holes in computers.” Singularities Can Exist Outside Black Holes—In Other Universes 2021-08-23T04:00:00Z This effect is a much larger scale verification of general relativity. College Physics for AP Courses 2015-08-12T00:00:00Z It assumes that general relativity is the correct theory of gravity throughout the universe. Astronomy 2016-10-13T00:00:00Z Now physicists seek a single theory that fuses general relativity, which describes gravity, with quantum field theory, which accounts for electromagnetism and the nuclear forces. Science Should Not Try to Absorb Religion and Other Ways of Knowing 2021-06-25T04:00:00Z The observation appears to stray from Einstein's theory of general relativity - posing a conundrum for researchers. New dark matter map reveals cosmic mystery 2021-05-27T04:00:00Z Today another strange prediction from general relativity—wormholes, those fantastical sounding tunnels to the other side of the universe—hang in the same sort of balance. Wormhole Tunnels in Spacetime May Be Possible, New Research Suggests 2021-05-20T04:00:00Z Gravitational waves are mass-created distortions in space that propagate at the speed of light and are predicted by general relativity. College Physics for AP Courses 2015-08-12T00:00:00Z Some basic ideas about modern cosmology clarified, using general relativity. Astronomy 2016-10-13T00:00:00Z The results, astronomers said, would help clarify how black holes work their violent magic, further test the predictions of Einstein’s theory of general relativity and perhaps shed light on the origin of cosmic rays. What Do You Call a Bunch of Black Holes: A Crush? A Scream? 2021-04-22T04:00:00Z These remarks undercut the realist claim that mathematical theories like quantum mechanics and general relativity work because they mirror nature. I'm Agonizing over My Naive Realism 2021-03-19T04:00:00Z I usually work on general relativity and cosmology. The Most Accurate Flat Map of Earth Yet 2021-02-17T05:00:00Z They found its orbit to change precisely as predicted by general relativity, a strong indication of gravitational waves, and were awarded the 1993 Nobel Prize. College Physics for AP Courses 2015-08-12T00:00:00Z In weak gravitational fields, the predictions of general relativity agree with the predictions of Newton’s law of gravity. Astronomy 2016-10-13T00:00:00Z Vacuum energy is thought to be the main ingredient in the “cosmological constant,” a mathematical term in the equations of general relativity. The Cosmological Constant Is Physics’ Most Embarrassing Problem 2021-02-01T05:00:00Z “Are black holes strictly the same as you would expect with general relativity or are they different?” asks Clifford Will, a gravitational theorist at the University of Florida. After decades of effort, scientists are finally seeing black holes—or are they? 2021-01-07T05:00:00Z Were quantum mechanics and general relativity waiting for us to discover them in the same way that gold, gravity and galaxies were waiting? Is the Schrödinger Equation True? 2021-01-07T05:00:00Z At the time he developed general relativity, Einstein considered that an illogical possibility. College Physics for AP Courses 2015-08-12T00:00:00Z However, in the stronger gravity of the Sun, general relativity makes predictions that differ from Newtonian physics and can be tested. Astronomy 2016-10-13T00:00:00Z Albert Einstein first invented it in 1917 as a mathematical kludge to force his general relativity field equations to predict a static universe, as he and most scientists then believed the cosmos to be. The Cosmological Constant Is Physics’ Most Embarrassing Problem 2021-02-01T05:00:00Z Assuming the objects are classical black holes, researchers can calculate from general relativity how the chirplike gravitational wave signal from a merger should speed up, climax in a spike, and then ring down. After decades of effort, scientists are finally seeing black holes—or are they? 2021-01-07T05:00:00Z Wigner, a prominent quantum theorist, notes that the equations embedded in Newton’s laws of motion, quantum mechanics and general relativity are extraordinarily, even unreasonably effective. Is the Schrödinger Equation True? 2021-01-07T05:00:00Z Gravitational waves are wrinkles in space, predicted by general relativity but not yet observed, caused by changes in very massive objects. College Physics for AP Courses 2015-08-12T00:00:00Z General relativity renders gravity in a new light: Instead of thinking of it as a force, general relativity describes gravity as a bending or warping of space-time. Time travel for travelers? It’s tricky. 2020-12-28T05:00:00Z Freese and her colleagues, for instance, sought to eliminate the need for the constant to explain the acceleration of the universe by altering the way general relativity calculations should be applied to the expanding cosmos. The Cosmological Constant Is Physics’ Most Embarrassing Problem 2021-02-01T05:00:00Z The merger produces a perturbed black hole just like the one in Teukolsky’s old thesis, offering another test of general relativity. After decades of effort, scientists are finally seeing black holes—or are they? 2021-01-07T05:00:00Z Second, quantum mechanics and general relativity, the foundational theories of modern physics, are mathematically incompatible. Is the Schrödinger Equation True? 2021-01-07T05:00:00Z Similarly, under what circumstances could general relativity be used? College Physics for AP Courses 2015-08-12T00:00:00Z With general relativity, things really start to get interesting. Time travel for travelers? It’s tricky. 2020-12-28T05:00:00Z Another angle on updating general relativity is called sequestration, proposed by Padilla and his colleagues. The Cosmological Constant Is Physics’ Most Embarrassing Problem 2021-02-01T05:00:00Z It satisfies the mathematical requirements of Albert Einstein’s theory of gravity, general relativity, says Carlos Palenzuela Luque, a gravitational theorist at the University of the Balearic Islands. After decades of effort, scientists are finally seeing black holes—or are they? 2021-01-07T05:00:00Z These conflicts, like the incompatibility of quantum mechanics and general relativity, might imply that physics is incomplete or wrong. Is the Schrödinger Equation True? 2021-01-07T05:00:00Z As we shall see later in the study of general relativity, space is curved in the vicinity of very massive bodies, such as the Sun, and time actually slows down near massive bodies. College Physics for AP Courses 2015-08-12T00:00:00Z To do that, researchers add to a theory like general relativity an additional, tunable field called a scalar field. To explain away dark matter, gravity would have to be really weird, cosmologists say 2020-11-20T05:00:00Z If general relativity isn't the problem, though, maybe quantum mechanics is. The Cosmological Constant Is Physics’ Most Embarrassing Problem 2021-02-01T05:00:00Z Because Sgr A* packs so much mass into such a small volume, general relativity predicts it must be a supermassive black hole. After decades of effort, scientists are finally seeing black holes—or are they? 2021-01-07T05:00:00Z Mathematical models such as quantum mechanics and general relativity work, extraordinarily well. Is the Schrödinger Equation True? 2021-01-07T05:00:00Z In confirming Galileo’s gravity experiment yet again, the result upholds the equivalence principle, a foundation of Albert Einstein’s theory of gravity, general relativity. Galileo’s famous gravity experiment holds up, even with individual atoms 2020-10-30T04:00:00Z Black holes are gravitational potholes in space-time predicted by general relativity, Albert Einstein’s theory of gravity. A Black Hole’s Lunch: Stellar Spaghetti 2020-10-17T04:00:00Z Perhaps these efforts to understand the cosmological constant problem will reveal deeper truths about quantum physics and general relativity. The Cosmological Constant Is Physics’ Most Embarrassing Problem 2021-02-01T05:00:00Z But Özel says that even with limited resolution, EHT can contribute significantly to testing general relativity in the conceptual terra incognita around a black hole. After decades of effort, scientists are finally seeing black holes—or are they? 2021-01-07T05:00:00Z “Black hole shadows are a good test in that alternative theories predict something different than what general relativity predicts,” says Feryal Özel, an astrophysicist at the University of Arizona and the EHT.* Nobel Prize Work Took Black Holes from Fantasy to Fact 2020-10-08T04:00:00Z But he dared to conduct an experimental test that proved this notion wrong, and established the “equivalence principle,” which in turn became a foundation for Albert Einstein’s theory of general relativity. Nature's Splendor Exceeds Our Imagination 2020-09-29T04:00:00Z For almost half a century after it was proposed, general relativity was sidelined from the mainstream of physics. How Astronomers Revolutionized Our View of the Cosmos 2020-09-01T04:00:00Z Probing general relativity is also one of the objectives of the Roman Space Telescope. Europe’s Euclid Space Telescope Will See Cosmos with Panoramic Vision 2020-08-05T04:00:00Z “Even though it’s very unlikely, it would be so amazingly important if we found that there was any deviation” from the predictions of general relativity, Carroll says. After decades of effort, scientists are finally seeing black holes—or are they? 2021-01-07T05:00:00Z Earlier this month, by carefully scrutinizing the shape of the shadow seen by the EHT, Özel and her colleagues made some of the most precise measurements of general relativity. Nobel Prize Work Took Black Holes from Fantasy to Fact 2020-10-08T04:00:00Z If general relativity matched LIGO’s measurements when pi was not close to its true figure, that would be a sign that the theory was only half-baked. Pi in the Sky: General Relativity Passes the Ratio’s Test 2020-05-19T04:00:00Z It was the strongest evidence yet that these bizarre predictions of general relativity actually exist. How Astronomers Revolutionized Our View of the Cosmos 2020-09-01T04:00:00Z Its measurements of galaxies and supernovae will allow researchers to better estimate the expansion rate of the universe, clarifying the role of dark energy and, with that information, further testing the validity of general relativity. Europe’s Euclid Space Telescope Will See Cosmos with Panoramic Vision 2020-08-05T04:00:00Z However, other effects in general relativity should counteract that effect on the shadow. After decades of effort, scientists are finally seeing black holes—or are they? 2021-01-07T05:00:00Z So far those measurements agree with predictions, but it is possible that with more precision, deviations from general relativity that hint at a deeper underlying theory will show up. Nobel Prize Work Took Black Holes from Fantasy to Fact 2020-10-08T04:00:00Z Matter falling into a black hole ends up in a singularity where the curvature of spacetime diverges and Einstein’s equations of general relativity break down. In Search of Naked Singularities 2020-05-03T04:00:00Z The chord also confirms a prediction of Einstein’s theory of gravity, or general relativity. Gravitational waves reveal unprecedented collision of heavy and light black holes 2020-04-18T04:00:00Z If a 1973 book full of equations on general relativity attracted so much interest from non-experts, are we underestimating how much maths people are willing to deal with? How physics is rocked by the waves of history 2020-04-05T04:00:00Z “I don’t think we’re going to learn anything more about general relativity or the theory of black holes from any of this,” says Robert Wald, a gravitational theorist at the University of Chicago. After decades of effort, scientists are finally seeing black holes—or are they? 2021-01-07T05:00:00Z In contrast, over the subsequent several decades, physicists witnessed the emergence of the special theory of relativity, general relativity and quantum mechanics, theories that revolutionized our understanding of physical reality and thus disproved Michaelson’s forecast. Why the Pursuit of Scientific Knowledge Will Never End 2020-04-06T04:00:00Z If such regions of spacetime affect us, we would not be able to predict our future using general relativity. In Search of Naked Singularities 2020-05-03T04:00:00Z But if the black holes have distinctly different masses, then general relativity predicts that they should also generate weaker waves at higher frequencies, or overtones. Gravitational waves reveal unprecedented collision of heavy and light black holes 2020-04-18T04:00:00Z Once she discovered Einstein’s general relativity, she recognized her calling in theoretical physics. What Called Them to Physics? 2020-04-01T04:00:00Z Early predictions of general relativity differed only slightly from those of Newton’s theory. After decades of effort, scientists are finally seeing black holes—or are they? 2021-01-07T05:00:00Z They were an unwelcome prediction of Albert Einstein’s theory of gravity, general relativity. Infinite Visions Were Hiding in the First Black Hole Image’s Rings 2020-03-28T04:00:00Z Despite this well-known example, mathematicians and philosophers still argue whether cosmic censorship should limit the scope of “reasonable” spacetimes in general relativity. In Search of Naked Singularities 2020-05-03T04:00:00Z The overtone rang roughly as loudly as predicted by general relativity, Isi says. Gravitational waves reveal unprecedented collision of heavy and light black holes 2020-04-18T04:00:00Z His works catalysed large bodies of research, from general relativity to biology. Louis Nirenberg (1925–2020) 2020-02-16T05:00:00Z Others soon proved that, in general relativity, mass and spin are the only characteristics a black hole can have, implying that Kerr’s mathematical formula, known as the Kerr metric, describes every black hole there is. After decades of effort, scientists are finally seeing black holes—or are they? 2021-01-07T05:00:00Z That would only happen in the wake of the successful British eclipse expedition in 1919 to confirm general relativity, Einstein’s theory of gravitation. When Einstein Was Bohemian 2020-02-11T05:00:00Z In a recent colloquium at Harvard’s Black Hole Initiative, a philosopher defined cosmic censorship as one of the most stimulating questions in current studies of general relativity. In Search of Naked Singularities 2020-05-03T04:00:00Z The pulsar’s metronome-like radio emissions showed researchers how this extreme relativistic system pulls space-time around it, causing the pulsar’s orbit to wobble exactly as predicted by general relativity. Daily briefing: Genetically engineered gut microbes can protect honey bees 2020-01-30T05:00:00Z For now, the quest to test general relativity with ever greater scrutiny continues, with this latest astrophysical case being yet another confirmation of Einstein’s theory. Bizarre Cosmic Dance Offers Fresh Test for General Relativity 2020-01-30T05:00:00Z Skeptics argued that black holes might be an artifact of general relativity’s subtle math, or that they might only form under unrealistic conditions, such as the collapse of a perfectly spherical star. After decades of effort, scientists are finally seeing black holes—or are they? 2021-01-07T05:00:00Z Einstein’s Prague was not just a place to work on general relativity. When Einstein Was Bohemian 2020-02-11T05:00:00Z Among other things, the firewall idea implies that Einstein’s general relativity is completely wrong, at least at the horizon of a black hole. Have We Solved the Black Hole Information Paradox? 2020-01-30T05:00:00Z In particular, there is no guarantee that general relativity reigns over the entire expanse of the cosmos. Physicists Probe Validity of Einstein’s Gravity on Cosmic Scales 2020-01-21T05:00:00Z For scientists studying general relativity, the system is a literal match made in heaven. Bizarre Cosmic Dance Offers Fresh Test for General Relativity 2020-01-30T05:00:00Z An affirmative result would cement the case that black holes are what general relativity predicts, Yunes says. After decades of effort, scientists are finally seeing black holes—or are they? 2021-01-07T05:00:00Z Many mathematicians and physicists tend toward Platonism, which suggests we don’t really invent pi or the theory of general relativity so much as we discover them. Do We Possess a Transpersonal Imagination? 2020-01-19T05:00:00Z The theory of general relativity, published by Einstein a hundred years ago, predicted the existence and features of this beast remarkably well. The science stories that shaped 2019 2019-12-22T05:00:00Z But in the last half of the 20th century, general relativity became the theory of the universe. Physicists Probe Validity of Einstein’s Gravity on Cosmic Scales 2020-01-21T05:00:00Z “We got really excited, because that meant either something was wrong with the data or our analysis—or it was signaling new physics beyond general relativity,” Venkatraman Krishnan says. Bizarre Cosmic Dance Offers Fresh Test for General Relativity 2020-01-30T05:00:00Z The existence of a spin-2 particle leads inevitably to general relativity. The conceptual mistake that lies at the heart of economics 2019-12-15T05:00:00Z Even Albert Einstein almost didn’t believe they were real, he said, even though it was his theory of general relativity that helped predict them more than 100 years ago. Scientists find ‘monster’ black hole so big they didn’t think it was possible 2019-11-29T05:00:00Z In 1919, when general relativity was confirmed astronomically, science knew nothing of cosmic origins. Shared consciousness, artificial imagination, and the Universe’s first seconds: Books in brief 2019-11-12T05:00:00Z But general relativity’s string of successes may not be endless. Physicists Probe Validity of Einstein’s Gravity on Cosmic Scales 2020-01-21T05:00:00Z Scientists must endure not merely Shakespeare’s King Lear, but Newton’s laws of motion, Darwin’s theory of natural selection, and Einstein’s theory of general relativity. How Harold Bloom, the Late Literary Critic, Helped Me Write The End of Science 2019-10-20T04:00:00Z Similarly, in his 1915 paper on general relativity, Einstein used a trampoline as a two-dimensional analogue for space. How Mere Humans Manage to Comprehend the Vastness of the Universe 2019-10-11T04:00:00Z Otherwise, a black hole must be featureless, or so says Einstein’s theory of gravity, general relativity. Black hole reverberations suggest the cosmic beasts are as ‘bald’ as cue balls 2019-09-13T04:00:00Z Or it could point to the need for a more fundamental rewrite of general relativity, Albert Einstein's theory of gravity. Robot detector to map cosmos for clues to dark energy 2019-09-11T04:00:00Z But the dark stuff’s existence is deduced from the assumption that general relativity is correct. Physicists Probe Validity of Einstein’s Gravity on Cosmic Scales 2020-01-21T05:00:00Z When telescopes collect data about the large-scale structure of the universe, those data are compared against our best simulations, which are themselves based on theories such as general relativity and quantum mechanics. Faced with Data Deluge, Astronomers Turn to Automation 2019-08-21T04:00:00Z A black hole obliterating a neutron star also represents a new arena for testing general relativity. Astronomers Spy a Black Hole Devouring a Neutron Star 2019-08-19T04:00:00Z Ultimately, he says, the goal is to measure multiple modes and show that they relate to one another as general relativity predicts—or not. Black hole reverberations suggest the cosmic beasts are as ‘bald’ as cue balls 2019-09-13T04:00:00Z Supergravity was an early attempt to do so, combining particle physics with Einstein’s theory of gravity, general relativity. Speculative ‘supergravity’ theory wins US$3-million prize 2019-08-05T04:00:00Z Traveling to the interior of a black hole to test general relativity would be a poor strategy, for many reasons. Physicists Probe Validity of Einstein’s Gravity on Cosmic Scales 2020-01-21T05:00:00Z A new analysis of data from Keck and other observatories lends credence to general relativity.Credit: Daily briefing: Current global warming is unparalleled in 2,000 years 2019-07-25T04:00:00Z Scientists use such information to test predictions of general relativity. Hawaii Telescope Protest Shuts Down 13 Observatories on Mauna Kea 2019-07-22T04:00:00Z Its frequency and duration agree with the predictions of general relativity—and thus, support the no-hair theory. Black hole reverberations suggest the cosmic beasts are as ‘bald’ as cue balls 2019-09-13T04:00:00Z Turning supergravity’s mathematical machinery to general relativity, however, enabled physicists to prove that particles cannot have negative masses and energies. Speculative ‘supergravity’ theory wins US$3-million prize 2019-08-05T04:00:00Z “By analyzing the structure of the accretion flow,” writes Ferreira, “it will be possible to probe the structure of spacetime … and test whether it is consistent with general relativity.” Physicists Probe Validity of Einstein’s Gravity on Cosmic Scales 2020-01-21T05:00:00Z Scientists use this type of data to test predictions of general relativity. Hawaii telescope protest shuts down 13 observatories on Mauna Kea 2019-07-17T04:00:00Z Notoriously — at least among theoretical physicists — general relativity doesn’t explain how gravity works at the tiniest of scales, the realm of subatomic particles. 100 years ago, an eclipse changed the known laws of physics and made Einstein Einstein 2019-05-28T04:00:00Z Specifically, they point to a mass and spin that match those from computer simulations of the entire event, based on general relativity, to within 10%. Black hole reverberations suggest the cosmic beasts are as ‘bald’ as cue balls 2019-09-13T04:00:00Z For instance, general relativity apparently allows particles to have negative masses and energies, in theory. Speculative ‘supergravity’ theory wins US$3-million prize 2019-08-05T04:00:00Z If general relativity ever fails, multiple competing gravity theories proposed in recent decades would be waiting in the wings. Physicists Probe Validity of Einstein’s Gravity on Cosmic Scales 2020-01-21T05:00:00Z I’m not entirely satisfied with this answer, but monks with an eighth-grade level of math are not able to handle the rigor of general relativity. Tibetan Monks Meet Science near the Roof of the World 2019-05-28T04:00:00Z His best option was to test a bizarre prediction of Einstein's theory of general relativity. The man who made Einstein world-famous 2019-05-23T04:00:00Z That concordance supports the notion, baked into general relativity, that these are the only parameters that characterize the final black hole. Black hole reverberations suggest the cosmic beasts are as ‘bald’ as cue balls 2019-09-13T04:00:00Z Those formulas could prove valuable in tests of general relativity, McWilliams says, especially as black holes are objects made of pure gravitational energy, with no messy matter to get in the way. Theorist calculates the incalculable siren song of merging black holes 2019-05-02T04:00:00Z “Unification of general relativity and quantum physics is widely considered as the most outstanding open problem in fundamental physics,” physicist Abhay Ashtekar of Penn State University said at a recent symposium for science writers. Physicists Probe Validity of Einstein’s Gravity on Cosmic Scales 2020-01-21T05:00:00Z Einstein's general relativity framework provided an extended and more precise reach beyond the furthest reaches of our own galaxy. Cosmology Has Some Big Problems 2019-04-30T04:00:00Z In 1916, Albert Einstein published his theory of general relativity in full mathematical detail. Einstein, Eddington and the 1919 eclipse 2019-04-14T04:00:00Z The image, a ring of fire surrounding the blackest of shadows, is a powerful confirmation of Albert Einstein’s theory of gravity, or general relativity, which was used to predict black holes 80 years ago. Top stories: Black hole’s first close-up, pseudoarchaeology, and hunting for human pheromones 2019-04-12T04:00:00Z But even as detections accumulate, one theorist has made an advance that could change how the team analyzes the signals and make it easier to test Albert Einstein’s theory of gravity, general relativity. Theorist calculates the incalculable siren song of merging black holes 2019-05-02T04:00:00Z Such a unifying theory, most experts believe, would entail some sort of modification to general relativity. Physicists Probe Validity of Einstein’s Gravity on Cosmic Scales 2020-01-21T05:00:00Z It is of course entirely plausible that the validity of general relativity breaks down much closer to our own home than at the edge of the hypothetical end of the universe. Cosmology Has Some Big Problems 2019-04-30T04:00:00Z Einstein first publicly aired the theory of general relativity to the Prussian Academy of Sciences in 1915. Einstein, Eddington and the 1919 eclipse 2019-04-14T04:00:00Z Months after Einstein produced the equations for general relativity, German physicist Karl Schwarzschild calculated that if an object is dense enough, it would create what we now call a black hole. See a black hole for the first time in a historic image from the Event Horizon Telescope 2019-04-10T04:00:00Z According to general relativity, gravity arises when mass and energy warp spacetime. Theorist calculates the incalculable siren song of merging black holes 2019-05-02T04:00:00Z But despite the triumph of Einstein’s theory—general relativity—physicists still wonder whether it will someday face the same fate as Newton’s law. Physicists Probe Validity of Einstein’s Gravity on Cosmic Scales 2020-01-21T05:00:00Z Even Albert Einstein, whose theory of general relativity made it possible to conceive of such a place, thought the concept was too bizarre to exist. What Is a Black Hole? Here’s Our Guide for Earthlings 2019-04-10T04:00:00Z Black holes were first predicted by Einstein’s theory of general relativity, which reimagined gravity as the warping of space and time by matter and energy. Black hole picture captured for first time in space ‘breakthrough’ 2019-04-10T04:00:00Z Taken over four days when astronomers had “to have the perfect weather all across the world and literally all the stars had to align,” the image helps confirm Einstein’s general relativity theory, Dempsey said. Scientists reveal first image ever made of a black hole 2019-04-10T04:00:00Z LIGO’s and Virgo’s observations have already confirmed general relativity’s accuracy to an unprecedented level, but researchers should be able to push further as they hone their instruments’ sensitivity. Theorist calculates the incalculable siren song of merging black holes 2019-05-02T04:00:00Z In all cases, the form of the waves matched the predictions of Einstein's theory of general relativity. Gravitational Observatories Hunt for Lumpy Neutron Stars 2019-04-08T04:00:00Z The research will put to the test a scientific pillar - physicist Albert Einstein’s theory of general relativity, according to University of Arizona astrophysicist Dimitrios Psaltis, project scientist for the Event Horizon Telescope. In astrophysics milestone, first photo of black hole expected 2019-04-06T04:00:00Z If we are to have a complete physics, we must unify the geometrical picture of spacetime given by general relativity with quantum physics. Space: The Final Illusion 2019-04-04T04:00:00Z According to Einstein’s general relativity, gravitational lenses form because galaxies and galaxy clusters noticeably warp spacetime. Has LIGO Seen Galaxy-Warped Gravitational Waves? 2019-01-18T05:00:00Z By monitoring fluctuations in the signal, the team planned to search for gravitational waves from the cosmos and test general relativity during the spacecraft's journey to Saturn, which began in 1997. Missions expose surprising differences in the interiors of Saturn and Jupiter 2019-01-17T05:00:00Z The authors concluded by wondering if the same topological ideas about curvature might apply to general relativity. This Is the Way the Paper Crumples 2018-11-26T05:00:00Z But with the hypothetical addition “exotic matter,” this sci-fi invention actually fits within the confines of Einstein’s theory of general relativity, which describes gravity and the bending of space-time by matter. Where’s Our Warp Drive to the Stars? 2018-11-20T05:00:00Z Indeed, one way to approach quantum gravity is to aim to derive the Einstein equations, which are the laws general relativity applies to spacetime, from the laws of thermodynamics, applied to myriads of elementary events. Space: The Final Illusion 2019-04-04T04:00:00Z Even Einstein doubted they existed, despite his theory of general relativity predicting that they must. The Milky Way's Monster, Unveiled 2018-10-31T04:00:00Z The ugly, infinity-dependent singularity at its heart defeated both general relativity and quantum mechanics. Black-hole chronicles: chasing the gravitational beast 2018-10-16T04:00:00Z As well as answering a conundrum in general relativity, her namesake theorem became a guiding principle for the discovery of new physical laws. Friday briefing: A US island faces the end of the world 2018-09-13T04:00:00Z What Dr. Alcubierre, now director of the Nuclear Sciences Institute at the National Autonomous University of Mexico, did was to construct a special solution to the general relativity equations that described a “warp bubble.” Where’s Our Warp Drive to the Stars? 2018-11-20T05:00:00Z As well as answering a conundrum in general relativity, this theorem became a guiding principle for the discovery of new physical laws. Celebrate the mathematics of Emmy Noether 2018-09-11T04:00:00Z Over the last year, however, mathematicians have brought the mathematics of general relativity into sharper focus. To Test Einstein's Equations, Poke a Black Hole 2018-08-27T04:00:00Z He is best-known for the principle of falsification, a means of distinguishing pseudo-scientific theories, like astrology and Freudian psychoanalysis, from genuine ones, like quantum mechanics and general relativity. The Paradox of Karl Popper 2018-08-25T04:00:00Z The flat line is the prediction from Newtonian gravity; the bump is the prediction from general relativity. Star swings around black hole, tests gravity 2018-07-29T04:00:00Z Combining the observations allowed Genzel’s team to detect the star’s gravitational redshift—its light being stretched to longer wavelengths by the black hole’s immense gravitational pull, which is consistent with the predictions of general relativity. Milky Way's Black Hole Provides Long-sought Test of Einstein's General Relativity 2018-07-26T04:00:00Z “This is the first step on a ladder of tests of general relativity,” says Gillessen. Star’s black hole encounter puts Einstein’s theory of gravity to the test 2018-07-26T04:00:00Z Two groups have come up with proofs related to an important problem in general relativity called the black hole stability conjecture. To Test Einstein's Equations, Poke a Black Hole 2018-08-27T04:00:00Z Combining the observations allowed Genzel’s team to detect the star’s gravitational redshift — its light being stretched to longer wavelengths by the black hole’s immense gravitational pull, which is consistent with the predictions of general relativity. Milky Way’s black hole provides long-sought test of Einstein’s general relativity 2018-07-25T04:00:00Z In general relativity, there are no closed orbits. Star swings around black hole, tests gravity 2018-07-29T04:00:00Z Examples of the second case−radical novelty from old theories−are the heliocentric system and general relativity. Physics Needs Philosophy / Philosophy Needs Physics 2018-07-19T04:00:00Z Because general relativity predicts a null effect, the grading is a simple pass or fail. General relativity verified by a triple-star system 2018-07-03T04:00:00Z Einstein elaborated this dramatic insight in several equations, referred to as his “field equations,” that form the core of his theory of general relativity. To Test Einstein's Equations, Poke a Black Hole 2018-08-27T04:00:00Z In fact, it’s an important theme in Albert Einstein’s immensely successful theory of general relativity, which describes how gravity works. Triple-Star Test Shows Einstein Was Right, Again 2018-07-05T04:00:00Z Not just any theory, but one that sets scientists’ expectations for how the universe operates at large: Einstein’s general relativity. Einstein's Greatest Theory Validated on a Galactic Scale 2018-06-22T04:00:00Z Black holes are gravitational pits, trap doors to eternity, predicted by Einstein’s theory of gravity, general relativity. Black Hole Drags Star to Dusty Death 2018-06-14T04:00:00Z More importantly, the authors have provided what is known as a strong-field test of general relativity. General relativity verified by a triple-star system 2018-07-03T04:00:00Z After World War II Wheeler became an authority on general relativity. Do Our Questions Create the World? 2018-06-09T04:00:00Z There is a lot at stake—if general relativity breaks down for certain situations then we would need a revised or modified theory of gravity. Triple-Star Test Shows Einstein Was Right, Again 2018-07-05T04:00:00Z In 2011 that research netted a Nobel Prize, but its validity hinges on general relativity being the correct description of gravity at cosmological scales. Einstein's Greatest Theory Validated on a Galactic Scale 2018-06-22T04:00:00Z In a letter to a friend, Einstein contemplated the challenge of merging general relativity with his other brainchild, the nascent theory of quantum mechanics. What Is Spacetime? 2018-05-24T04:00:00Z Both quantum theory, which governs the subatomic realm, and Einstein’s general relativity, which describes reality at cosmic scales, are often viewed as the most important developments in 20th-century physics. A Conversation with Thomas Hertog, One of Stephen Hawking's Final Collaborators 2018-05-24T04:00:00Z The singularities at the centers of astrophysical black holes mark the breakdown of Einstein’s theory of gravity, general relativity. Maybe We Could "See" a Singularity After All 2018-05-22T04:00:00Z If general relativity holds, then Delta should be equal to zero. Triple-Star Test Shows Einstein Was Right, Again 2018-07-05T04:00:00Z In keeping with general relativity, the “foreground” galaxy’s great bulk warps the surrounding fabric of spacetime, forming a “gravitational lens” that distorts and magnifies the far-distant background galaxy’s light. Einstein's Greatest Theory Validated on a Galactic Scale 2018-06-22T04:00:00Z Contrary to his preference for a static cosmos, Einstein’s theory of general relativity predicted a universe that would inevitably expand or collapse. Cosmic Conflict: Diverging Data on Universe's Expansion Polarizes Scientists 2018-05-16T04:00:00Z Rovelli is one of the creators and champions of loop quantum gravity theory, one of several ongoing attempts to marry quantum mechanics with general relativity. The illusion of time 2018-04-15T04:00:00Z After taking time away to focus on general relativity, Einstein returned to the quantum theory of light in July 1916. Einstein and the Quantum 2018-03-27T04:00:00Z It provides valuable new empirical evidence that general relativity remains our best model of how gravity works, so we are unlikely to need any new or modified theories at this point. Triple-Star Test Shows Einstein Was Right, Again 2018-07-05T04:00:00Z Precisely measure those distortions, and you gain a good sense of how much mass the foreground galaxy should contain according to general relativity. Einstein's Greatest Theory Validated on a Galactic Scale 2018-06-22T04:00:00Z Gravitational wave observations let us test general relativity in situations where a gravitational field is strong and highly dynamical. Stephen Hawking's final interview 2018-03-26T04:00:00Z Matter and energy curve the fabric of spacetime, resulting in gravitational fields, according to Einstein's theory of general relativity. Black Hole Pretenders Could Really Be Bizarre Quantum Stars 2018-03-16T04:00:00Z On the other side of the scale is general relativity, which explains how gravity works. How Stephen Hawking’s biggest achievement linked opposing worlds of physics 2018-03-15T04:00:00Z Will we ever find a situation where general relativity breaks down? Triple-Star Test Shows Einstein Was Right, Again 2018-07-05T04:00:00Z With an error margin of just 9 percent, the experiment’s findings are the most precise measurement of general relativity beyond our solar system to date. Einstein's Greatest Theory Validated on a Galactic Scale 2018-06-22T04:00:00Z Some people think that general relativity needs modifying in order to avoid introducing dark energy and dark matter. Stephen Hawking's final interview 2018-03-26T04:00:00Z Stephen Hawking's fame was founded on the research he did on general relativity and black holes. Hawking's warnings: What he predicted about the future 2018-03-15T04:00:00Z But Einstein’s Nobel wasn’t for his famed theory of general relativity. Lack of evidence put Hawking’s Nobel hopes in black hole 2018-03-14T04:00:00Z But the continuing success of general relativity, first written down a century ago, must surely be celebrated as one of the most incredible intellectual achievements of our species. Triple-Star Test Shows Einstein Was Right, Again 2018-07-05T04:00:00Z To that end, he is already working on a follow-up experiment, one using a different gravitational lens slightly farther away from Earth to test general relativity all over again. Einstein's Greatest Theory Validated on a Galactic Scale 2018-06-22T04:00:00Z Gravitational waves are a new way to search for a signature of possible modifications of general relativity. Stephen Hawking's final interview 2018-03-26T04:00:00Z Black holes are the ultimate monster of general relativity. Stephen Hawking: The science that made him famous 2018-03-14T04:00:00Z “Hawking’s important contribution was identifying new ways to answer those questions and formulating mathematically sophisticated ways of connecting general relativity and quantum mechanics.” Stephen Hawking, physicist who came to symbolize the power of the human mind, dies at 76 2018-03-13T04:00:00Z These ranged from accretion disks and jets, the violent relaxation of stellar systems, stellar dynamics and spiral structure to general relativity. Donald Lynden-Bell (1935–2018) 2018-02-27T05:00:00Z Einstein himself, when he published general relativity, said that he did not expect that such waves would ever actually be detected. Gravitational-wave astronomy starts in earnest 2017-10-16T04:00:00Z The final section, on general relativity, is perhaps the most challenging, as the authors are well aware. Physics: A classical toolkit : Nature : Nature Research 2017-10-10T04:00:00Z But it is notoriously difficult to extract quantitative predictions from the equations of Einstein’s general relativity. LIGO's unsung heroes 2017-10-08T04:00:00Z Weiss conceived of the first L-shaped laser interferometers while teaching a course on general relativity at MIT decades ago. Three Americans win Nobel Prize in physics for gravitational wave discovery 2017-10-03T04:00:00Z Einstein’s general relativity says that gravity is caused by heavy objects bending space-time. AP Explains: Why gravitational wave researchers won a Nobel 2017-10-03T04:00:00Z Over a century ago, Albert Einstein predicted the existence of these waves in his theory of general relativity. Nobel Prize in physics awarded to three scientists for the detection of gravitational waves 2017-10-03T04:00:00Z "I'm very happy that they got the right people," says Charles Misner, a general relativity theorist at the University of Maryland in College Park. Gravitational wave detection wins physics Nobel 2017-10-02T04:00:00Z In 1916, Albert Einstein suggested that gravitational waves could be a natural outcome of his theory of general relativity. Gravitational Waves Won the Physics Nobel Prize—Here's Why 2017-10-03T04:00:00Z The waves were predicted by Einstein a century ago as part of his theory of general relativity. Nobel prize cites finding of ripples in fabric of universe 2017-10-03T04:00:00Z Gravitational waves were predicted by Albert Einstein a century ago as part of his theory of general relativity. Nobel Physics Prize Goes to Three Scientists For Discoveries in Gravitational Waves 2017-10-03T04:00:00Z “If you see any of the other four it kills general relativity,” he says. Trio of detectors homes in on black hole sources of gravitational waves 2017-09-27T04:00:00Z That "equivalence principle" now serves as the cornerstone of Albert Einstein's theory of gravity, general relativity, and physicists are keen to test it in as many ways as they can. Coolest science ever headed to the space station 2017-09-07T04:00:00Z Longer events enable much more precise tests of Albert Einstein’s general relativity, the theory that predicts gravitational waves—perhaps giving more clues to neutron star origins. Rumors Swell Over New Kind of Gravitational-Wave Sighting 2017-08-24T04:00:00Z In 1919, an eclipse proved vital to Albert Einstein as he worked to confirm his theory of general relativity. An omen of doom and source of awe: A glimpse into the history of solar eclipses 2017-08-01T04:00:00Z It took Albert Einstein’s theory of general relativity, published in 1915, to show that warped space-time would be enough to explain Mercury’s unusual path. Three times scientists learned something from solar eclipses—and three times they were tricked 2017-08-17T04:00:00Z Gravitational waves are a spectacular prediction of Albert Einstein's theory of gravity, general relativity. Trio of detectors homes in on black hole sources of gravitational waves 2017-09-27T04:00:00Z Albert Einstein’s theory of general relativity was still being met with skepticism. What Solar Eclipses Have Taught Us About the Universe 2017-08-09T04:00:00Z Thomson called general relativity one of the highest achievements of mankind, describing it “as a whole continent of new scientific facts.” The eclipse that revealed the universe 2017-08-04T04:00:00Z Presiding over the meeting, the physicist J. J. Thomson called general relativity one of the highest achievements of mankind, describing it “as a whole continent of new scientific facts.” The Eclipse That Revealed the Universe 2017-07-31T04:00:00Z According to general relativity, the rate at which a clock ticks changes with the strength of the gravitational field in which it sits — an effect called gravitational time dilation. Witness gravity’s quantum side in the lab 2017-07-10T04:00:00Z So general relativity lives to fight another day. Trio of detectors homes in on black hole sources of gravitational waves 2017-09-27T04:00:00Z “We expect that any deviations from general relativity would happen in the most extreme conditions – that’s where you’d expect the theory would break,” said Berry. Tying loose ends? Gravitational waves could solve string theory, study claims 2017-07-05T04:00:00Z Poetically, it was this same phenomenon — gravitational lensing — that first demonstrated the validity of general relativity almost 100 years ago. Astronomers just achieved something Einstein said was impossible 2017-06-13T04:00:00Z One of the yellowing pages, bearing Einstein’s signature and embossed seal, and a handwritten general relativity equation, opens at $8,000 and is expected to sell for at least twice that. Einstein letters on God, McCarthy, Israel go up for auction 2017-06-12T04:00:00Z The reason is that most physicists think that the intersection between quantum theory and general relativity is too difficult to access through laboratory experiments. Witness gravity’s quantum side in the lab 2017-07-10T04:00:00Z But because general relativity treats time as a fourth dimension, equivalent to the three dimensions of space, in a way that Newtonian gravity does not, metric-field distance is measured in both space and time. Time may be fuzzy. If so, the idea of causality may be in trouble 2017-06-08T04:00:00Z Einstein first predicted gravitational microlensing in his theory of general relativity. Astronomers saw one star warp another’s light in a way that Einstein thought we’d never see 2017-06-07T04:00:00Z “This is a really elegant piece of work they’ve done,” says astronomer Martin Barstow of the University of Leicester in the United Kingdom, “and a nice echo of a century of general relativity.” Astronomers measure the mass of a star—thanks to an old tip from Einstein 2017-06-07T04:00:00Z Black holes were an entirely unwelcome consequence of his theory of general relativity that ascribes gravity to the warping of space-time geometry by matter and energy. Cosmic Vibrations Felt From Black-Hole Merger 3 Billion Light Years Away 2017-06-01T04:00:00Z Either quantum theory prevails and gravity too is ‘quantized’; or general relativity prevails and quantum theory applies only at certain scales. Witness gravity’s quantum side in the lab 2017-07-10T04:00:00Z It therefore obeys both quantum mechanics and the theory of general relativity. Time may be fuzzy. If so, the idea of causality may be in trouble 2017-06-08T04:00:00Z First predicted by Einstein more than a century ago as a consequence of his theory of general relativity, gravitational waves were long thought to be beyond observational reach—if not entirely nonexistent. LIGO's Latest Black-Hole Merger Confirms Einstein, Challenges Astrophysics 2017-06-01T04:00:00Z But up until LIGO’s first detection, gravitational waves were the last big unconfirmed part of Albert Einstein’s theory of general relativity. A third detection of gravitational waves is changing our understanding of black holes 2017-06-01T04:00:00Z Even Albert Einstein almost didn't believe they were real, even though it was his theory of general relativity that helped predict them more than 100 years ago. What does a black hole look like? Astronomers are on a quest to find out. 2017-04-05T04:00:00Z I’ve never seen an outsider theory come close to the precision of general relativity in describing cosmological motion and the action of gravity. Opinion | Whose scientific theories are permitted into the mainstream? 2017-03-17T04:00:00Z They also hope to chart the size and shape of the event horizon—the boundary of the black hole—to test whether Albert Einstein's theory of gravity, general relativity, still works under such extreme conditions. This global telescope may finally see the event horizon of our galaxy's giant black hole 2017-03-02T05:00:00Z While LIGO’s latest event may be a brick in the towering edifice of Einstein’s general relativity, it is also restructuring the foundations of our understanding of black holes. LIGO's Latest Black-Hole Merger Confirms Einstein, Challenges Astrophysics 2017-06-01T04:00:00Z “If general relativity is wrong in some way, you should eventually be able to see deviations from its predictions in the shape of the shadow and behaviour of our galaxy’s great black hole.” Edge of darkness: looking into the black hole at the heart of the Milky Way 2017-02-26T05:00:00Z The technique, they say, depends only on geometry and Einstein’s theory of gravity, general relativity, making it independent of other assumptions about dust or the makeup of stars. Cosmos Controversy: The Universe Is Expanding, but How Fast? 2017-02-20T05:00:00Z Walker attacks his subject with energy, examining experimental and theoretical results; implications such as entanglement; and the apparent disjunction between general relativity and quantum mechanics. Books in brief : Nature : Nature Research 2017-02-14T05:00:00Z In general relativity, those tiny quantum fluctuations produce an energy that would serve as the cosmological constant. A simple explanation of mysterious space-stretching ‘dark energy?’ 2017-01-10T05:00:00Z By the way, no general relativity means: no GPS. Gravitational Waves Detected, Confirming Einstein’s Theory 2016-02-11T05:00:00Z However, its main purpose is simply to test general relativity. Edge of darkness: looking into the black hole at the heart of the Milky Way 2017-02-26T05:00:00Z Of course, even the male astronomers were more comfortable counting stars than trying to understand Einstein’s newly published theory of general relativity. How women at Harvard helped solve the mysteries of the stars 2017-01-06T05:00:00Z The discovery verified part of Albert Einstein’s theory of general relativity, according to the researchers, and offers new ways to study the universe and its beginning. The Top 10 Science Stories of 2016 2016-12-30T05:00:00Z They begin with a variant of general relativity that Einstein himself invented called unimodular gravity. A simple explanation of mysterious space-stretching ‘dark energy?’ 2017-01-10T05:00:00Z But although the team’s paper offers “tantalizing hints” of a departure from general relativity, so far these are just hints, says Giddings. LIGO black hole echoes hint at general-relativity breakdown 2016-12-08T05:00:00Z Thanks to Einstein’s theory of general relativity, it was stamped in the annals of physics more than a century ago at about 1bn km/h. Theory challenging Einstein's view on speed of light could soon be tested 2016-11-28T05:00:00Z She was part of a team of international scientists and engineers that in 2015 detected gravitational waves, which were predicted by Einstein's theory of general relativity. Top Female Scientists Pave the Way for Future Generations 2016-10-07T04:00:00Z In the 1920s, Einstein toyed with adding a constant term to his equations of general relativity — equivalent to giving empty space its own energy. Dark energy: Staring into darkness : Nature : Nature Research 2016-09-27T04:00:00Z The second scenario jibes well with Einstein's theory of general relativity, which posits that gravity arises when mass and energy warps space and time. A simple explanation of mysterious space-stretching ‘dark energy?’ 2017-01-10T05:00:00Z In the late 1960s, the MIT physics department asked him to teach a graduate course on general relativity. Meet the college dropout who invented the gravitational wave detector 2016-08-04T04:00:00Z The cluster’s intense gravity warps the spacetime around it and bends passing light, much like a lens—a key prediction of Einstein’s theory of general relativity. New Hubble Picture Reveals a Warped View of Galaxies 2016-07-21T04:00:00Z The map also showed the gravity component to be inline with the predictions of general relativity on smaller scales where dark energy doesn’t dominate yet. Week in Geek - Science like a BOSS edition 2016-07-17T04:00:00Z According to general relativity, this cosmological constant would indeed oppose the force of ordinary gravity. Dark energy: Staring into darkness : Nature : Nature Research 2016-09-27T04:00:00Z “GPS systems on your phone will not work without general relativity,” Cavagliá said. Universe rings a bell: Professors help prove Einstein theory 2016-07-17T04:00:00Z “I couldn’t tell them that I didn’t know any general relativity,” he says. Meet the college dropout who invented the gravitational wave detector 2016-08-04T04:00:00Z This enabled the researchers to get a test of general relativity that was in some respects twice as precise as their test during the first detection. LIGO detects whispers of another black-hole merger 2016-06-14T04:00:00Z That's the warp in the fabric in the cosmos that Albert Einstein predicted a century ago in his theory of general relativity, something that results only from the most massive space crashes. A crucial second note heard in soundtrack of chaotic cosmos 2016-06-15T04:00:00Z For example, physicists determined that one of the black holes was spinning frenetically, at roughly 20% of the maximum spin rate allowed by general relativity. LIGO detects another black hole crash 2016-06-15T04:00:00Z One jettisoned the principle of equivalence between acceleration and gravity that lies at the heart of general relativity; others violated aspects of quantum field theory, which describes the interactions of subatomic particles. We want information 2016-06-02T04:00:00Z Trump would be just as credible vowing to bring peace to the Middle East, while reconciling quantum mechanics and general relativity, and in his spare time, solving the Kobayashi Maru. Trump's debt-elimination plan is simply bonkers 2016-04-04T04:00:00Z The signal also provided researchers with the first empirical test of general relativity beyond regions — including the space around the binary pulsar — where there is comparatively little space-time warping. The black-hole collision that reshaped physics 2016-03-22T04:00:00Z One of his early acquisitions was a document called the Einstein-Musso - 54 pages of calculations on the theory of general relativity - which he bought for just over 500,000 euros. Were investors conned into buying rare manuscripts? - BBC News 2016-03-14T04:00:00Z And because the new event includes many more cycles, it tests predictions of general relativity somewhat more stringently than the first event, González says. LIGO detects another black hole crash 2016-06-15T04:00:00Z Put simply: Einstein's theory of general relativity – bolstered by the discovery of gravitational waves – provides a gateway for guided exploration into the possibility of time travel. Time Travel Might Be Possible After Discovery of Gravitational Waves 2016-02-23T05:00:00Z First up, the ladies discuss gravitational waves, their significance for Einstein's general relativity, and what promise they may hold for astronomy. Verge ESP: Buy the ticket, take the ride 2016-02-19T05:00:00Z Gravitational waves are one of the many predictions of how the Universe behaves according to Einstein’s theory of general relativity. Week in Geek - Ripples in spacetime edition 2016-02-14T05:00:00Z This remarkable discovery, which confirmed the last major prediction of Einstein’s theory of general relativity and opens up a whole new way to explore the universe, will almost certainly merit a Nobel Prize in Physics. Riding Gravity Waves to the Big Bang and Beyond 2016-02-12T05:00:00Z String theory, which attempts to unite general relativity with quantum theory, is juggling with scales and energies well beyond anything experimentally accessible, but still there’s a clear motive: to reconcile two mutually incompatible ideas. There’s no space for today’s young Einsteins | Philip Ball 2016-02-12T05:00:00Z He published scientific papers, moved into an academic career, made ground-breaking strides in physics including developing the theory of general relativity, and was given the Nobel Prize in 1921. Albert Einstein: the man who predicted gravitational waves - BBC News 2016-02-12T05:00:00Z Scientists this week confirmed the existence of gravitational waves more than a century after Albert Einstein first proposed the theory as part of his theory of general relativity. A Brief History of the Search for Gravitational Waves 2016-02-11T05:00:00Z Gravitational waves, first postulated by Albert Einstein in 1916 as part of his theory of general relativity, are extraordinarily faint ripples in space-time, the continuum that combines both time and three-dimensional space. Breakthrough: Scientists detect Einstein’s gravity ripples 2016-02-11T05:00:00Z Comparing our data with Einstein’s predictions allowed us to test whether general relativity correctly describes such a collision – they passed with flying colours. The Discovery of Gravitational Waves Is a Whole New Chapter for Science 2016-02-11T05:00:00Z The theory of general relativity showed that masses warp space and that in a gravitational field time slows down. There’s no space for today’s young Einsteins | Philip Ball 2016-02-12T05:00:00Z WATCH: What is the theory of general relativity? Albert Einstein: the man who predicted gravitational waves - BBC News 2016-02-12T05:00:00Z Building on work published in 1905, the theory of general relativity tied together that what we commonly consider to be separate entities – space and time – into what is now called "space-time". Gravitational Waves and Why Their Discovery Is Such a Big Deal 2016-02-11T05:00:00Z Mass and energy warping the fabric of space is one of the pieces of general relativity that most captures the imagination. Gravitational Waves Discovered: Top Scientists Respond 2016-02-11T05:00:00Z First predicted by Einstein in 1916, gravitational waves are among the most paradoxical parts of his theory of general relativity. Found! Gravitational Waves, or a Wrinkle in Spacetime 2016-02-11T05:00:00Z Many physicists regard general relativity as a theory of exemplary beauty. There’s no space for today’s young Einsteins | Philip Ball 2016-02-12T05:00:00Z Gravitational waves were predicted by Albert Einstein in 1918, as part of his theory of general relativity. Scientists have finally proven Einstein’s century-old theory about gravitational waves 2016-02-11T05:00:00Z Predicted in 1918 using general relativity, frame dragging eluded confirmation until 2004, when researchers found that Earth’s rotation slightly shifted two satellites’ orbits. Einstein May Be About to Be Proved Right—Again 2016-02-10T05:00:00Z They do this, according to general relativity, by radiating gravitational waves. The ultra-violent origins of gold 2016-01-16T05:00:00Z A century after Albert Einstein formulated general relativity, the theory holds a profoundly strange place in modern life. It's about time: how sci-fi has described Einstein's universe 2016-01-15T05:00:00Z If such a signal exists and is verified, it would confirm one of the most dramatic predictions of Albert Einstein’s century-old theory of general relativity. Scientists struggle to stay grounded after possible gravitational wave signal 2016-01-11T05:00:00Z Einstein’s theory of general relativity completely altered how we perceive the Universe. Scientists have finally proven Einstein’s century-old theory about gravitational waves 2016-02-11T05:00:00Z Albert Einstein first proposed the existence of gravitational waves 100 years ago, and directly observing them would provide the final vindication for his masterwork: the theory of general relativity. Einstein May Be About to Be Proved Right—Again 2016-02-10T05:00:00Z In fact, the picture that emerges from the EHT next year will put general relativity on the line. Event horizon snapshot due in 2017 - BBC News 2016-01-07T05:00:00Z "It's just this incredible verification of general relativity," Foley told National Geographic in March, when he and his colleagues reported the lensed supernova in Science. View of Exploding Star Appears, Right on Cue 2015-12-17T05:00:00Z By pushing the limit of quantum entanglement, Pan says that the satellite will also help to solve fundamental mysteries about the universe, such as how to unite quantum mechanics with Einstein’s theory of general relativity. China’s dark matter satellite launches era of space science 2015-12-16T05:00:00Z Albert Einstein's theory of general relativity was 100 years old earlier this month. Einstein's theory of general relativity 100 years on - BBC News 2015-11-27T05:00:00Z The Einstein equations of general relativity are his best epitaph and memorial,” Stephen Hawking has written. The most beautiful theory 2015-11-25T05:00:00Z Astronomers rely on general relativity all the time, making use of the way masses bend the path of light. Event horizon snapshot due in 2017 - BBC News 2016-01-07T05:00:00Z This week marks the 100th anniversary of Einstein's work, and to celebrate, animator Eoin Duffy and a team of writers / producers created this three-minute video explaining what general relativity is and why it matters. David Tennant explains Einstein’s greatest theory on its 100-year anniversary 2015-11-25T05:00:00Z No one was thinking about making the most precise test yet of general relativity when the Soyuz rocket lifted off from French Guiana on 22 August 2014. Satellite launch accident provides unexpected test of Einstein’s theory 2015-11-25T05:00:00Z The field of general relativity is remarkably fertile. My Love Affair With Relativity 2015-11-25T05:00:00Z As far as the rest of the world was concerned, Eddington’s result put general relativity more or less beyond doubt. The most beautiful theory 2015-11-25T05:00:00Z But what exactly is general relativity and what did Einstein predict? What is Albert Einstein's Theory of General Relativity? - BBC News 2015-11-25T05:00:00Z And, in his quest to understand and explain general relativity, he sought to understand how of gravity performed in his epic theory when it was applied to the world of the supersmall. Einstein's Unfinished Dream: Marrying Relativity to the Quantum World 2015-11-24T05:00:00Z Devised 100 years ago this month, general relativity is a theory of gravity. Satellite launch accident provides unexpected test of Einstein’s theory 2015-11-25T05:00:00Z With general relativity, the stage itself sprang into action. A Century Ago, Einstein’s Theory of Relativity Changed Everything 2015-11-24T05:00:00Z Disappear like smoke For the first time, general relativity was explaining new phenomena in the world. The most beautiful theory 2015-11-25T05:00:00Z “The theory of general relativity is the scientific equivalent of Michelangelo’s Sistine Chapel,” said Pedro Ferreira, professor of astrophysics at Oxford University. Will this European satellite confirm Einstein’s last unproven idea? 2015-11-21T05:00:00Z This November marks the centennial of Albert Einstein's theory of general relativity. Einstein's Unfinished Dream: Marrying Relativity to the Quantum World 2015-11-24T05:00:00Z The turmoil and disruptions of World War I, for example, prevented many people from learning and thinking about general relativity. How Politics Shaped General Relativity 2015-11-06T05:00:00Z Black hole collisions are one of the universe’s primary sources of gravitational waves, ripples in spacetime predicted by general relativity but never directly observed. Flickering Quasar May Hold Black Holes on Collision Course 2015-09-22T04:00:00Z Neither provides an account of the real world, but the connection between them lets physicists recast intractable problems in quantum mechanics into the sort of equations found in general relativity, making them easier to crack. The most beautiful theory 2015-11-25T05:00:00Z However, it took the development of radio astronomy to fully underline the importance of general relativity. Will this European satellite confirm Einstein’s last unproven idea? 2015-11-21T05:00:00Z In layman's terms, this means that the mathematics of general relativity is smooth, without any sharp edges. Einstein's Unfinished Dream: Marrying Relativity to the Quantum World 2015-11-24T05:00:00Z According to general relativity, gravitation originates from the interplay between massive objects and the malleable fabric of space-time. Hunt for gravitational waves to resume after massive upgrade 2015-09-14T04:00:00Z Einstein espoused the picture he formulated in general relativity of time as inseparable from space and lacking the absolute reality that humans tend to perceive in it. Book Review: The Physicist and the Philosopher 2015-09-11T04:00:00Z At the time of the lectures it was the only thing he could point to that general relativity explained and previous science did not. The most beautiful theory 2015-11-25T05:00:00Z “Gravity had to be really, really important, and the only theory that makes it possible for us to understand gravity is general relativity.” Will this European satellite confirm Einstein’s last unproven idea? 2015-11-21T05:00:00Z Bridging the quantum world to relativity Einstein spent the rest of his life, without success, pursuing ways to integrate his theory of general relativity with quantum mechanics. Einstein's Unfinished Dream: Marrying Relativity to the Quantum World 2015-11-24T05:00:00Z OCR examined a year’s worth of the physics literature for references to general relativity or its conceptual offshoots. Relativity's Reach [Interactive Graphic] 2015-09-01T04:00:00Z Any devotee of Einstein will relish the chance to parse this annotated facsimile of the physicist's original manuscript on general relativity. Book Review: The Road to Relativity 2015-08-30T04:00:00Z Einstein had the conception behind general relativity before he had the theory. The most beautiful theory 2015-11-25T05:00:00Z In addition to black holes, they included quantum mechanics and general relativity, which is a theory of gravity. Jacob Bekenstein, towering theoretical physicist who studied black holes, dies at 68 2015-08-27T04:00:00Z Black holes are perplexing objects in part because they invoke two different theories of nature—quantum mechanics, which governs the subatomic world, and general relativity, which describes gravity and reigns on large cosmic scales. Stephen Hawking Hasn't Solved the Black Hole Paradox Just Yet 2015-08-27T04:00:00Z To put general relativity to its greatest test, we need to see whether it holds up where gravity is extremely strong. Does Einstein's Theory of Gravity Hold Near Black Holes? 2015-08-26T04:00:00Z A hundred years on, and the implications of Einstein's general relativity still surprise and delight. Physics Week in Review: August 22, 2015 2015-08-22T04:00:00Z The central brilliance of general relativity lay in Einstein’s subsequent assertion that they did. The most beautiful theory 2015-11-25T05:00:00Z That belief was founded on Einstein’s general relativity. Jacob Bekenstein, towering theoretical physicist who studied black holes, dies at 68 2015-08-27T04:00:00Z For Interstellar, special software was written to simulate the way gravity shapes time in space, with graphics driven entirely by Albert Einstein's equations for general relativity. Games and animation: Tackling the UK's creative skills shortage - BBC News 2015-08-19T04:00:00Z But what does general relativity actually tell us about the specific properties of space-time? Just How Resilient Is Spacetime? 2015-08-19T04:00:00Z OCR examined a year's worth of the physics literature for references to general relativity or its conceptual offshoots. Relativity's Influence Is Still Going Strong On Its 100th Birthday 2015-08-19T04:00:00Z At a public event Eddington was momentarily stumped by the suggestion that he “must be one of the three persons in the world who understand general relativity”. The most beautiful theory 2015-11-25T05:00:00Z Could quantum 'clocks' tread two different paths to general relativity? how interference with atomic clocks might be destroyed by phase shifts induced by gravitational time dilation. Physics Week in Review: August 8, 2015 2015-08-08T04:00:00Z So even if x-ray emission does not reveal the breakdown of general relativity near bumpy black holes, gravitational waves just might. Bumpy Black Hole X-Rays May Push the Limits of Einstein's Relativity 2015-08-06T04:00:00Z But a man named Albert Einstein that year, in his theory of general relativity, demonstrated that it wasn’t always the same, for space itself is distorted by hugely massive objects such as the sun. The Unsettling, Anti-Science Certitude on Global Warming 2015-07-31T04:00:00Z “It’s an interesting effect, but it’s still quantum physics applied to classical general relativity. In that way it doesn’t change our picture of the world,” adds Bassi. How gravity kills Schrödinger's cat 2015-06-16T04:00:00Z Einstein ring As part of his theory of general relativity, Albert Einstein theorized that massive objects would bend space and time. Galaxy-Sized Lens Reveals Star Birth in Deep Universe 2015-06-11T04:00:00Z And its size and shape could provide a judgment on general relativity, the harshest test yet a century after Einstein dreamed up the theory. Black Hole Hunters 2015-06-08T04:00:00Z Proving that the Kerr solution provides an accurate description of spacetime near a black hole would show that general relativity holds up even in environments of extreme gravity. Bumpy Black Hole X-Rays May Push the Limits of Einstein's Relativity 2015-08-06T04:00:00Z He spoke with practiced ease about the technical details of general relativity. John Nash’s memorable final appearances 2015-05-29T04:00:00Z In that period of his career, he untangled what he described as a “classical unsolved problem” related to differential geometry and to general relativity. John F. Nash Jr. dies; Nobel laureate’s life story inspired ‘A Beautiful Mind’ 2015-05-24T04:00:00Z According to general relativity, space itself has a structure. The centuries-old battle over the question of black holes 2015-05-08T04:00:00Z Conversely, they could produce the first indication that Einstein’s theory of gravity, general relativity, the rule of rules for the universe, needs fixing for the first time since it was introduced a hundred years ago. Black Hole Hunters 2015-06-08T04:00:00Z His dream was to incorporate Maxwell’s results into an extended form of general relativity and thereby unite electromagnetism with gravity. “Albert is an old fool”: Einstein vs Schrödinger in battle of the Nobel laureates 2015-04-18T04:00:00Z "It's also possible, with the same data, to show that dark energy is not a good theory for explaining what's going on - and in fact, general relativity itself is wrong." Dark matter map unveils first results 2015-04-13T04:00:00Z Physicists are also excited about a highly conjectural connection between moonshine and quantum gravity, the as-yet-undiscovered theory that will unite general relativity and quantum mechanics. Mathematicians Chase Moonshine’s Shadow 2015-04-07T04:00:00Z Michell and Laplace had done their thinking in a Newtonian framework, but it took general relativity to give “dark stars” a solid theoretical foundation. The centuries-old battle over the question of black holes 2015-05-08T04:00:00Z “The least exciting thing would be to find general relativity works beautifully,” said Dr. Broderick, at the Perimeter Institute. Black Hole Hunters 2015-06-08T04:00:00Z After eight long years of effort his theory of general relativity, which would propel him to international celebrity, was finally summed up in just two pages. Albert Einstein on the Secret to Learning 2015-04-06T04:00:00Z By investigating the theoretical quandaries firewalls pose, physicists hope to find a path toward rectifying the two successful but incompatible theories of general relativity and quantum mechanics. Black Hole Firewall Mystery: Submit Your Questions for Physicist Joseph Polchinski 2015-03-26T04:00:00Z At the time, there was no way to prove what he was saying, but it’s a part of his theory of general relativity. The Next Einstein May Be A 27-Year-Old Iranian Woman 2015-03-10T04:00:00Z The greater the mass of an object, the more space-time curves around that object and the stronger its gravitational pull, the discovery enshrined in Einstein's theory of general relativity, which celebrates its centennial this year. Scientists See Same Star Explode Four Times 2015-03-05T05:00:00Z If so, the result would sink general relativity, Albert Einstein’s theory of gravity. Feature: Drop-testing general relativity, Galileo’s way 2015-03-05T05:00:00Z Einstein's theory of general relativity predicts that these ripples in the fabric of space-time should be generated when massive objects like black holes coalesce and merge. 'Exquisite' gravity probe leaves UK 2015-02-28T05:00:00Z This is precisely no different than asking whether one believes in the theory of gravity or general relativity, but Walker would not answer. Scott Walker’s inartful dodge in London 2015-02-16T05:00:00Z These included a virtual black hole that required the development of a computer graphics rendering package that was driven by Albert Einstein's equations from the theory of general relativity. How to create a virtual black hole 2015-02-16T05:00:00Z The waves, first predicted by Einstein’s theory of general relativity, form after a particularly violent astrophysical event, like two black holes smashing together. That Old PlayStation Can Aid Science 2014-12-22T05:00:00Z But general relativity may not be the last word on gravity, because so far it cannot be reconciled with quantum mechanics, which governs physics on the smallest scales. Feature: Drop-testing general relativity, Galileo’s way 2015-03-05T05:00:00Z The film’s hard-science pedigree is guaranteed by its science adviser and executive producer, Kip Thorne, one of the world’s leading experts on Einstein’s theory of general relativity. Black holes, space travel and the science of the movie ‘Interstellar’ Ever since black holes were found to be a theoretical prediction of Einstein’s theory of general relativity, they’ve captured the public’s imagination. The Week in Geek: Black hole edition 2014-11-02T04:00:00Z Interstellar is as interested in how general relativity would affect your family life, for example, as it is in the theory itself. Interstellar review 2014-10-27T04:00:00Z In general relativity, an event horizon is the boundary in space-time beyond which events cannot affect an outside observer. The Flat Debt Society 2014-10-21T04:00:00Z The equivalence principle proved key to Einstein’s invention of general relativity. Feature: Drop-testing general relativity, Galileo’s way 2015-03-05T05:00:00Z |
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