| 单词 | orbital motion |
| 例句 | He realized that the orbital motion results from the tendency of the Moon to move in a straight line, plus a single force pulling it towards the Earth. The Scientists 2003-10-21T00:00:00Z Ironically, though, while Newton was distracted from following up his ideas about gravity, in 1674 Hooke had struck to the heart of the problem of orbital motion. The Scientists 2003-10-21T00:00:00Z The first ferroic property was an unconventional magnetism: The electrons coordinated their orbital motion, like planets circling in the same direction. From a five-layer graphene sandwich, a rare electronic state emerges 2023-10-18T04:00:00Z The expansion of the winds plus the orbital motion of the stars makes their interaction geometrically complex. Dazzling New JWST Image Shows Dusty Stellar Spirals 2022-10-25T04:00:00Z The spin and intrinsic magnetic field of the electron can make only one of two angles with another magnetic field, such as that created by the electron’s orbital motion. College Physics for AP Courses 2015-08-12T00:00:00Z These stars have now been observed for almost two decades, and astronomers have detected their rapid orbital motions around the very center of the Galaxy. Astronomy 2016-10-13T00:00:00Z Surface mapping is only one of the spacecraft’s tasks for its 1.5-year sojourn near the asteroid; pinning down the object’s orbital motion to meter-scale precision is another important goal. NASA Spacecraft Will Visit Apophis, Once Earth’s Deadliest Asteroid Threat 2022-05-05T04:00:00Z "Hubble provided a time baseline, combined with Subaru data, of 13 years, which was sufficient to be able to detect orbital motion." Hubble discovers a Jupiter-like planet forming in a very strange way 2022-04-04T04:00:00Z Its characteristics were compatible with orbital motion, and incompatible with rotation. Who Really Discovered the First Exoplanet? 2019-11-12T05:00:00Z The orbital motions and spins of the planets are in the same direction as the original spin and conserve the angular momentum of the parent cloud. College Physics for AP Courses 2015-08-12T00:00:00Z There are two ways this astronomer could try to detect the orbital motion of the Sun. Astronomy 2016-10-13T00:00:00Z This method effectively increases exposure times beyond the limit imposed by image smearing that is caused by a moon’s orbital motion. A new moon for Neptune 2019-02-19T05:00:00Z The infrared emissions from the flares exhibit a characteristic wobble due to their orbital motion around the black hole. The Milky Way's Central Black Hole is a Hot Spot for Astrophysics 2018-11-25T05:00:00Z Some were concerned that the Doppler shifts were from stellar pulsations, rather than orbital motion; maybe the surface of 51 Peg was bulging out, then sinking back with a regular rhythm. Who Really Discovered the First Exoplanet? 2019-11-12T05:00:00Z These and other aspects of orbital motion, such as the rotation of the Earth, will be covered analytically and in greater depth later in this text. College Physics for AP Courses 2015-08-12T00:00:00Z Our star turns in a west-to-east direction, like the orbital motions of the planets. Astronomy 2016-10-13T00:00:00Z The orbital motions of seven planets in the Trappist-1 system are linked in a complex chain. Citizen science bags five-planet haul 2018-01-12T05:00:00Z The combination of spin and orbital motion within the nucleus is called total angular momentum. The Last Woman to Win a Physics Nobel 2017-09-26T04:00:00Z “Now think of two going around each other, and each one spinning clockwise or counterclockwise,” aligned with the orbital motion. LIGO's Latest Black-Hole Merger Confirms Einstein, Challenges Astrophysics 2017-06-01T04:00:00Z Prograde orbital motion is the anticlockwise revolution of bodies around the Sun when seen from above the north ecliptic pole of the Solar System. A retrograde co-orbital asteroid of Jupiter : Nature : Nature Research 2017-03-28T04:00:00Z We call the shift in the apparent direction of a star due to Earth’s orbital motion stellar parallax. Astronomy 2016-10-13T00:00:00Z Underlying the simple, attractive graphics is a simulator that captures the physics of gravity and orbital motion. Want to blow up things in space? Here’s an app that let’s you do it. 2016-09-10T04:00:00Z This is due to the fact that during the pre-midnight hours we are on the "trailing" side of the Earth, due to our orbital motion through space. Six Minor Meteor Showers Could Beat the Perseids This Summer 2014-07-28T04:00:00Z Comparing them with the newer images, he says, “we could see a bit of orbital motion.” CSI NASA: Using Old Space Images to Find New Planets 2014-04-28T10:00:20Z If they're really the product of stellar mergers, they should spin fast: As two stars merge, the angular momentum of their orbital motion spins up the single merged star so that it whirls rapidly. ScienceShot: What Makes a Monster Star? 2012-08-09T18:44:32Z Since the rotation period of the Sun can be determined by observing the apparent motions of sunspots, a correction must be made for the orbital motion of Earth. Astronomy 2016-10-13T00:00:00Z In the Earth-moon system, tides cause the moon to slowly drift away from Earth - a side effect of the fact that Earth's rotation is much quicker than the moon's orbital motion. Brown Dwarfs Being Gobbled Up by Parent Stars 2012-06-14T18:19:02Z The mass of Venus is ascertained by the perturbations in the orbital motion of the earth. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z The axial tilt of Uranus is 98°, so effectively the planet is now spinning in a direction opposite to its orbital motion around the sun. Did Mercury and Uranus Have a Rough Youth After All? 2011-10-06T20:09:06Z Then they would assume their normal velocity of revolution on their axis, and their orbital motion along evenly balanced lines of force, without friction or change, for countless ages. The Universe a Vast Electric Organism 2011-06-09T02:00:22.450Z Before midnight, you are observing from the “back side” of Earth, and the only meteors you see will be those that traveled fast enough to catch up with Earth’s orbital motion. Astronomy 2016-10-13T00:00:00Z However, in a star-brown dwarf binary, the star's rotation is much slower than the brown dwarf's orbital motion, so the companion is dragged inward. Brown Dwarfs Being Gobbled Up by Parent Stars 2012-06-14T18:19:02Z Indeed, Keeler ascertained the velocity of their orbital motion and found that in each case it agreed exactly with that required by the Keplerian law. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z For example, the earth, in its orbital motion around the sun, should emit about .001 watt, which would result in its falling a millionth of a centimeter toward the sun in a billion years! Gravity, by George Gamow [Special Archive Article] 2011-03-04T13:45:00.433Z In astronomy, “element” is used of any one of the numerical or geometrical data by which the course of a varying phenomenon is computed; it is applied especially to orbital motion and eclipses. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z We now know that the populations differ not only in their locations in the Galaxy, but also in their chemical composition, age, and orbital motions around the center of the Galaxy. Astronomy 2016-10-13T00:00:00Z The electronic theory of the chemical atom supposes, in fact, that atoms are congeries of electrons in rapid orbital motion. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z The form of the spiral is preserved by the orbital motion of its particles. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z Strictly speaking, the nodes are those points of the sky against which the moon's center is projected at the moment when in its orbital motion it cuts through the plane of the earth's orbit. A Text-Book of Astronomy 2011-01-05T03:00:57.347Z But because the cluster shares several properties with the bulge, such as chemical composition and orbital motion, astronomers consider the age of 47 Tucanae a good proxy for that of the bulge. New Hubble Pictures Suggest Milky Way Fell Together 2010-05-05T16:21:00Z If so, their orbital motions may be easily calculated, being deducible from the motion of the glacier compounded with the inclination of the veins. The Glaciers of the Alps Being a narrative of excursions and ascents, etc. The movements of rotation of these various bodies and of the sun in the same direction as the orbital motions, and mostly in planes little different; 4. Essays: Scientific, Political, & Speculative, Vol. I They may be likened to double stars which are permanent neighbors, with some orbital motion, though exceedingly slow. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z The rotation on their axes of the Sun, planets, and satellites is in the same direction as their orbital motion. The Astronomy of Milton's 'Paradise Lost' If such calculations are reliable, the query must arise, How much effect can such a meteoric shower every day in the year exert on the orbital motion of the earth, in retarding its velocity? Buchanan's Journal of Man, January 1888 Volume 1, Number 12 But the spectra of the fixed stars can also tell us something about orbital motion in these extremely distant systems. The Story of the Heavens The effect of the sun's orbital motion would be, that it would be unable to again exert sufficient inductive power upon the comet to bring it within its inductive influence once more. Aether and Gravitation He was an assistant of Tycho Brahe and accepted the diurnal while denying the orbital motion of the earth. A Budget of Paradoxes, Volume I The calculations of the mass and distance and orbital motion of the other star were therefore very difficult, but the final results looked good. Islands of Space Russ watched, his hand on the control steadying the view under the Earth's complicated orbital motion, and rotation, further corrections for the ship's orbital motion making the job one requiring great skill. Invaders from the Infinite This great globe will also illustrate the law that the more distant a planet is, the slower is the velocity with which its orbital motion is accomplished. The Story of the Heavens Even this diagram does not accurately represent the orbital motion of the moon through space, as it assumes that the earth returns to the same point in space from whence it started. Aether and Gravitation Subsequent measures, of far greater precision than those obtainable by other methods in the case of easily separated double stars, show the rapid orbital motion of the components of the system. The New Heavens The space tug accelerated at four gravities in the direction opposed to its orbital motion. Space Tug The comet of 1680, called Newton's, was the very first whose orbital motions were dealt with on the principles of Newtonian astronomy, and Halley's was the first whose periodic character was recognized. Scientific American Supplement, No. 633, February 18, 1888 Yet even if 1,200 units of rotational momentum had been transferred to the orbital motion it would only correspond with the most trivial difference in the distance of Jupiter from the sun. The Story of the Heavens It would, therefore, be unphilosophical to revert to the old conception of a gravitating attractive power as the sole cause of the sun's orbital motion through space. Aether and Gravitation Thus, wholly or in part, the activity of organisms is recurrently affected by the great energy—tides set up by the Earth's orbital motion. The Birth-Time of the World and Other Scientific Essays "Community of drift" is visible in many distinct sets; while there is as yet no perceptible evidence, from orbital motion, of association into subordinate systems. Scientific American Supplement, No. 623, December 10, 1887 On the 16th it was seen again, and its orbital motion followed. Recreations in Astronomy With Directions for Practical Experiments and Telescopic Work In Vogel's photographs, Spica, which was not variable, by a small shifting of its lines revealed a backward and forward periodical pulsation due to orbital motion. Scientific American Supplement No. 819, September 12, 1891 Are there any indications given by astronomical observations which lead us to the conclusion that stars do possess such orbital motions? Aether and Gravitation The obvious body to take in the first instance is the earth itself, which on account of its annual orbital motion is travelling through space at the rate of about 18 miles per second. The Project Gutenberg Encyclopedia Volume 1 of 28 But since during this action the wheel D turns relatively to the pin b, the moon evidently rotates about its axis with an angular velocity precisely equal to that of its orbital motion. Scientific American Supplement, No. 447, July 26, 1884 Another method of getting the distance from the sun is to measure the velocity of the earth’s orbital motion, giving the circumference traversed in a year, and so the radius of the orbit. History of Astronomy As the star is faint, there is as yet no direct spectroscopic evidence of orbital motion. Darwin and Modern Science These apparent motions are due to the rotation of the earth on its axis, and its orbital motion round the sun. Aether and Gravitation He was led to this demonstration through considering the orbital motion of the moon. A History of Science — Volume 2 The movements of rotation of the sun, of the planets, and the satellites, are in the same direction as their orbital motions, and in planes little different. History of the Conflict Between Religion and Science The orbital motion of a cloud or stream of small particles was indicated. History of Astronomy The earth’s axis rotates about the pole of the ecliptic, making one revolution and a twenty-six thousandth part of a revolution in the sidereal year, in the opposite direction to its orbital motion. History of Astronomy Nothing is more certain, however, than that careful astronomical observations have revealed the fact that stars have actual orbital motions of their own through space. Aether and Gravitation That such is really the case was demonstrated presently through calculations as to the moons of Jupiter and by similar computations regarding the orbital motions of the various planets. A History of Science — Volume 2 |
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