| 单词 | helium |
| 例句 | Thus copper sits on top of silver and silver sits on top of gold because of their chemical affinities as metals, while helium, neon, and argon are in a column made up of gases. A Short History of Nearly Everything 2003-05-06T00:00:00Z It is, moreover, very difficult to explain in any other way why there should be so much helium in the universe. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z In 2001 researchers at the California Institute of Technology analyzed helium isotopes from sediments left from the later KT impact and concluded that it affected Earth’s climate for about ten thousand years. A Short History of Nearly Everything 2003-05-06T00:00:00Z Two protons and two neutrons are the nucleus of a helium atom, which turns out to be very stable. Cosmos 1980-01-01T00:00:00Z Their gravity drew to them substantial quantities of nearby gas, growing clouds of hydrogen and helium that were destined to become clusters of galaxies. Cosmos 1980-01-01T00:00:00Z Like the opposite of talking goofy after sucking helium. The Season of Styx Malone 2018-10-16T00:00:00Z These stars converted some of the original hydrogen and helium into elements like carbon and oxygen, out of which we are made. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z At the next-heaviest atom, helium, the model began to break down, creating the anomalies that drew from Max Born his expression of despair. Big Science 2015-07-07T00:00:00Z “It’s like taking a giant helium balloon full of your worries and just letting it go.” When Dimple Met Rishi 2017-05-30T00:00:00Z His body felt insubstantial, like he was made of helium and cotton candy. The House of Hades 2013-10-08T00:00:00Z But the universe, all of it, almost everywhere, is 99 percent hydrogen and helium,* the two simplest elements. Cosmos 1980-01-01T00:00:00Z So in a last-ditch effort, I squeaked “I had a really great weekend” to Annie, but I sounded like a third grader on helium. Winger 2013-05-14T00:00:00Z A star tens of times more massive than the Sun can stably convert hydrogen to helium for only a few million years before moving briefly on to more exotic nuclear reactions. Cosmos 1980-01-01T00:00:00Z Meanwhile the selfgravity of the Sun will force a renewed contraction of its helium- rich core and a further increase in its interior temperatures and pressures. Cosmos 1980-01-01T00:00:00Z Every bone still seemed to tremble, and my head suddenly felt full of helium. All American Boys 2015-09-29T00:00:00Z The early universe was filled with radiation and a plenum of matter, originally hydrogen and helium, formed from elementary particles in the dense primeval fireball. Cosmos 1980-01-01T00:00:00Z He’d learned to move normally within the Death Mist, more or less, but the magical shroud still made him feel like he was wrapped in a coat of helium. The House of Hades 2013-10-08T00:00:00Z The adrenaline surge was back, flooding my limbs and head like helium, lifting me up, dizzy-up, ready to swing. Tradition 2018-05-01T00:00:00Z If we bring it close to the uranium ore, which is emitting helium nuclei in a spontaneous nuclear decay, the count rate, the number of clicks per minute, increases dramatically. Cosmos 1980-01-01T00:00:00Z These would convert the hydrogen into more helium, and the heat given off would raise the pressure, and so stop the clouds from contracting any further. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z Linda seemed to wilt, while Mark looked like one of those helium balloons that Joaquin had gotten from a birthday party when he was seven. Far from the Tree 2017-10-03T00:00:00Z She tried to swallow the huge knot in her throat, but it just kept getting bigger and bigger, a balloon swelling on a helium tank. Ivy Aberdeen’s Letter to the World 2018-03-06T00:00:00Z “Look at me, and tell me that symbol of the first inert gas, helium.” Okay for Now 2011-04-05T00:00:00Z The helium nuclei will be jammed together still more tightly, so much so that they begin to stick together, the hooks of their short-range nuclear forces becoming engaged despite the mutual electrical repulsion. Cosmos 1980-01-01T00:00:00Z Out of the corner of my eye I see a toddler refusing to let go of his helium prize. Counting by 7s 2013-08-29T00:00:00Z Although 98 percent of all the matter that exists was created with the Big Bang, that matter consisted exclusively of light gases: the helium, hydrogen, and lithium that we mentioned earlier. A Short History of Nearly Everything 2003-05-06T00:00:00Z Rishi whistled as he walked into the den, his heart lifting like a helium balloon in spite of himself. When Dimple Met Rishi 2017-05-30T00:00:00Z Eventually alpha rays were identified as helium atoms stripped of their electrons—that is, helium nuclei-—and beta rays as energetic electrons. Big Science 2015-07-07T00:00:00Z Eventually, the gas will be so hot that when the hydrogen atoms collide they no longer bounce off each other, but instead coalesce to form helium. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z The awesome supernova explosion ejects into space most of the matter of the precursor star—a little residual hydrogen and helium and significant amounts of other atoms, carbon and silicon, iron and uranium. Cosmos 1980-01-01T00:00:00Z I suddenly felt as though my head had filled with helium. Confessions of a Murder Suspect 2012-09-24T00:00:00Z “Any undergraduate could see that nuclear physics using artificial beams of high-energy protons and helium ions was such a field, and ... he should stake out a territory there to work and grow in.” Big Science 2015-07-07T00:00:00Z Their words made me feel like one of the helium balloons that some families had brought. Out of My Mind 2010-03-09T00:00:00Z Within only a few hours of the big bang, the production of helium and other elements would have stopped. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z Every object is influenced by the environment it's in, so it’s impossible to cool anything in the universe—a banana, an ice cube, a dollop of liquid helium—to absolute zero. Zero: The Biography of a Dangerous Idea 2000-02-07T00:00:00Z An atom with one proton is an atom of hydrogen, one with two protons is helium, with three protons is lithium, and so on up the scale. A Short History of Nearly Everything 2003-05-06T00:00:00Z I tried to imagine standing on that cold, distant planet, breathing hydrogen and helium, viewing Earth from the other side of the solar system. We Are the Ants 2016-01-19T00:00:00Z All the planets orbit the Sun, the nearest star, an inferno of hydrogen and helium gas engaged in thermonuclear reactions, flooding the solar system with light. Cosmos 1980-01-01T00:00:00Z Instead of the drop I’d feared, we drifted slowly to the ground like a balloon leaking helium. Miss Peregrine's Home for Peculiar Children 2011-06-07T00:00:00Z They would remain stable in this state for a long time as stars like our sun, burning hydrogen into helium and radiating the resulting energy as heat and light. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z Eventually, the star gets so hot and dense that the hydrogen atoms stick to one another and fuse, creating helium and releasing large quantities of energy. Zero: The Biography of a Dangerous Idea 2000-02-07T00:00:00Z It sounded strange and high-pitched, like when you breathe in helium from a balloon and your voice gets squeaky. Tristan Strong Punches a Hole in the Sky 2019-10-15T00:00:00Z “Hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine,” I say. What If It's Us 2018-10-09T00:00:00Z Which makes Scoob feel like a helium balloon is expanding in his throat. Clean Getaway 2020-01-07T00:00:00Z It was like listening to a cartoon character talk while sucking helium and he was only really hearing every third word. Far from the Tree 2017-10-03T00:00:00Z As time went on, the hydrogen and helium gas in the galaxies would break up into smaller clouds that would collapse under their own gravity. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z His consciousness was like a small helium balloon, loosely tied to the top of his head. The House of Hades 2013-10-08T00:00:00Z These are great worlds, composed largely of hydrogen and helium, with smaller amounts of hydrogen-rich gases such as methane, ammonia and water. Cosmos 1980-01-01T00:00:00Z It can be more creative—a helium balloon, a fishhook, and Uncle Mark’s toupee. Ungifted 2012-08-21T00:00:00Z Three helium nuclei make a carbon nucleus; four, oxygen; five, neon; six, magnesium; seven, silicon; eight, sulfur; and so on. Cosmos 1980-01-01T00:00:00Z They would then contract slightly, and as they heated up further, would start to convert helium into heavier elements like carbon or oxygen. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z For example, if the electric charge of the electron had been only slightly different, stars either would have been unable to burn hydrogen and helium, or else they would not have exploded. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z The helium balloons sway in the gentle air currents or stand at attention. The Running Dream 2011-01-11T00:00:00Z Might the other chemical elements have somehow evolved from hydrogen and helium? Cosmos 1980-01-01T00:00:00Z By Rutherford’s reckoning, therefore, the helium atom had two orbital electrons and a nucleus comprising four protons and two electrons; radium had 138 electrons and a nucleus of 226 protons and 88 electrons. Big Science 2015-07-07T00:00:00Z The sensitive counter clicks when exposed to gamma rays or to such high-energy charged particles as protons and helium nuclei. Cosmos 1980-01-01T00:00:00Z Actually, I'm not a churl and think he is rather a good thing but he is increasingly sounding like Samwise Gamgee on helium, in making Alan Sugar laugh at himself and the mad contestants human. Rewind TV: The Hour; The Apprentice; Show Me the Funny; Imagine; Richard Hammond's Journey to the Centre of the Planet; Twenty Twelve ? review 2011-07-23T23:06:24Z July 30 Giant helium balloons, Seafair royalty, drill teams, equestrian units, clowns, pirates, bands, 7:30 p.m., Summer Guide | July 2016 events around Seattle 2016-05-12T04:00:00Z The parade, which features marching bands and giant helium balloons, travels on State Street from Congress Parkway to Randolph Street and is scheduled for 8-11 a.m. David Arquette to serve as grand marshal of McDonald's Thanksgiving Parade 2015-11-02T05:00:00Z Handler said she felt bad for President Biden: “Obama got to order the assassination of bin Laden, and all he gets to do is murder a bag of helium.” A ‘Bag of Helium’ Helps Chelsea Handler Start Her ‘Daily Show’ Guest Stint 2023-02-07T05:00:00Z His detractors accuse him of helium lightness and superficiality, of writing about art stars in a consistently adulatory tone. Calvin Tomkins Continues to Chronicle Artists 2011-10-04T20:34:15Z July 26 Giant helium balloons, drill teams representing local communities, equestrian units, clowns, pirates and bands, 7:30 p.m., July 2014 calendar of events 2014-05-12T04:00:00Z Once you let the Broadway-style helium out of this show, and its buoyant production numbers, “Sweet Charity” betrays its inner sourness. Review: A Thoroughly Modern ‘Sweet Charity’ Who Abandons Hope 2016-11-20T05:00:00Z Sebald leaves Walser here in a helium balloon, "over a sleeping nocturnal Germany… in a higher, freer realm" – that same kind of transforming condition to which his own writing so stubbornly aspired. A Place in the Country by WG Sebald – review 2013-04-27T14:00:01Z A hose attached to a helium tank was hooked up to the bag, and the door to Brooks' Upper East Side apartment was left unlocked, he said. Songwriter dies before NYC trial on sex charges 2011-05-23T20:27:07Z A strident perfectionist and curator of her art, Mitchell has in the past been dismissive of her earliest music, calling it the work of a “competent mimic” and even “a squeaky girl on helium.” Remarkable Records of Joni Mitchell’s Changes 2020-10-29T04:00:00Z The next, in May, saw black helium balloons tied to dead fish released in the Turbine Hall; staff had to shoot them down with air rifles. Crude awakening: BP and the Tate 2010-06-30T20:31:00Z The rest of the chemical elements, those heavier than hydrogen, helium, and lithium, were forged later, in the cores of stars. "The Big Bang Theory" and real science, from Leonard's wedding vows to the "Time Machine" prop 2019-05-16T04:00:00Z Helen Mirren and her posh accent hold up -- even on helium. Helen Mirren, not her accent, takes a hit of helium with Fallon 2015-03-31T04:00:00Z NASHVILLE, Tenn. — There are still helium balloons clinging to the ceiling and new toys scattered across a table in the living room when Joy Williams answers the door. The Civil Wars release new album despite hiatus 2013-07-08T18:02:41Z It wasn’t a head, of course, but a partially deflated helium balloon from our daughter’s birthday party that I had yet to tidy up. The Ghost Was the Least of Our Problems 2020-10-30T04:00:00Z Astronaut Snoopy will hover overhead as the parade returns to its pre-pandemic form this year, with its route restored through Manhattan and high-flying helium balloons once again pulled by handlers. Performers gear up for the Macy’s Thanksgiving Day Parade 2021-11-24T05:00:00Z Andy Warhol's set of silver helium balloons, floating around the stage in a liquid gleam of reflected light, delivers a delicious shock as the curtain rises. Rambert Dance Company 2010-05-27T22:55:00Z Picking it up, it's as though the stool is full of helium. Light is right at the Brit Insurance Design awards 2011 ? review 2011-02-17T09:51:50Z Eventually the core of the star reaches around 180,000,000°F, a temperature at which helium nuclei now travel fast enough to collide and fuse to form carbon. When the universe began 2012-07-22T12:00:00Z The film features Ed Asner providing the voice of a crabby widower who flies off on a grand adventure by lashing thousands of helium balloons to his house. Bigelow and "Hurt Locker" win big at Oscars 2010-03-08T05:49:00Z A concoction of glitter balls, mirrors and gilded helium balloons add to the sense of magic and illusion. Niobe, Regina di Tebe; Faust; The Makropulos Case; Fidelio 2010-09-25T23:06:00Z I exhale as much as I can, then inhale a full balloon as if it was helium. Is the growth in nitrous oxide misuse a laughing matter? 2014-08-13T04:00:00Z Downtown, there was a film; uptown, a school of fish-shaped helium balloons, attracted by currents of warm air, seemed to follow visitors around. An Art of Loopholes 2016-10-15T04:00:00Z A hose was attached to the bag and a small tank of helium nearby. Songwriter dies before NYC trial on sex charges 2011-05-23T20:27:07Z “I feel helium rising up under my skull.” Library of Congress welcomes recordings by the Doors, Righteous Brothers Oh, and he has a side business communicating with recently dead souls, whom he visualizes as human-shaped helium balloons huddled against the ceiling. A "Biutiful" chat with Javier Bardem 2010-12-30T00:01:00Z By the end of the first movement, the atmospheric loveliness of the music, which floated up like helium, made me forget the dress. Review: At the symphony ? Leila Josefowicz, 'Mother Goose' and some pixie dust 2011-04-08T22:03:05Z The site recommends groups raise $1,500 for shipping, insurance and helium. Liberal activists loved the Trump Baby blimp. Then they started fighting over it. 2018-10-05T04:00:00Z I developed the story, about a man mining helium-3 on the moon who meets his clone – and Nathan Parker wrote the script. How we made Moon – by Sam Rockwell and Duncan Jones 2019-07-23T04:00:00Z The family wouldn't agree to the marriage, because unfortunately he was a Prussian, and on top of that not long after he was killed in a disaster caused by a helium explosion. The Birthday Party and the Airman by ?ukasz D?bski, translated by Antonia Lloyd-Jones 2011-04-08T10:22:00Z He sounds like he’s been sucking helium as he bounces around the screen, long red hair being where no long red hair should be. Batman v Superman: no version of the characters can be right or wrong 2015-12-09T05:00:00Z By comparison, “Farcicals” is as light as helium, or perhaps nitrous oxide. ‘Ayckbourn Ensemble,’ 3 Offerings by the British Playwright 2014-06-12T04:00:00Z In one piece of performance art this year, a giant worm gave birth to a huge helium balloon. Catching fire: Burning Man is sparking sister festivals around the world 2015-08-30T04:00:00Z A large white helium balloon bobs above us, straining at its leash like an unruly moon. You'll See (Me Sailing in Antarctica) – review 2012-07-11T14:56:30Z But a word of caution: The National Inhalant Prevention Coalition says, "Inhaling helium sounds like fun until someone dies." Helen Mirren, not her accent, takes a hit of helium with Fallon 2015-03-31T04:00:00Z Instead, I watched her pull a balloon off a display, suck in the helium, and sing, “We’re the Chipmunks! C‑H‑I‑P‑M‑U‑N‑K‑S!” ‘Being cute just made me miserable’: Mara Wilson on growing up in Hollywood 2016-09-17T04:00:00Z The measurements, reported in a paper accepted for The Astrophysical Journal, revealed that these stars are made almost entirely of hydrogen and helium, and contain just trace amounts of heavier elements such as iron. Paging Neil deGrasse Tyson: Fossil galaxy may be relic of baby universe 2014-04-09T12:30:00Z Say bye to balloons: Considering their use of helium and latex, as well as the havoc they’re capable of causing when released, balloons generally aren’t endorsed by the experts we interviewed. How to throw a party that’s easy on the Earth 2021-06-29T04:00:00Z Jim and Hank seem quite physically corporeal in the story, whereas Glenn’s wife and daughter float around and hover like helium balloons: Who are the real ghosts here? David Rabe on the Netherworld of Fiction 2019-07-01T04:00:00Z Seattle Center; Torchlight Parade, giant helium balloons, drill teams, marching bands, Seafair Clowns, Pirates and princesses, equestrian units, 7:30 p.m. Community calendar: festivals, fairs and more 2014-07-24T04:00:00Z This same phenomenon is at work in neon signs, which are tubes of gases such as neon, helium and argon. The aurora borealis skipped this Alaska photography class. But some swinging light cords saved the night. 2021-02-26T05:00:00Z Throughout the routine, she mixes in clowning, whether it's making her bowtie spin, playing with prop bug-out glasses, or inhaling helium before speaking, all of which causes Jost to crack up. On "SNL," Cecily Strong's Goober the Clown nails the joy and comedy of abortion 2021-11-08T05:00:00Z The show is shot in an assortment of scenic locales, the better to show off the magic of helium. The Bachelor season 20, episode 5: this is the dawning of the age of amazing 2016-02-02T05:00:00Z I'm quite serious: One of Uxbal's sideline ventures is communicating with the recently departed, whom he sees hovering below the ceiling like human-shaped helium balloons. Best of Cannes: Javier Bardem is "Biutiful" 2010-05-21T18:21:00Z “I want to make it seem like he’s on helium, in this Queen of the Night register,” Mr. Aucoin said. A Young Composer Takes On Opera’s Oldest Myth 2020-01-31T05:00:00Z Believe it or not, this is a step towards the mainstream for Lynch, whose first album, 2009's Crazy Clown Time, set the vocals to "deranged helium fiend". David Lynch: The Big Dream – review 2013-07-11T20:30:00Z This barred him from using words like helium and uranium, a challenge when describing how a rocket ship or reactor works. Randall Munroe Explains It All for Us 2015-11-23T05:00:00Z This year's entry from Romania mixed pop and opera, and at times the female lead sounded like Mariah Carey on helium. Eurovision Crowns a German Pop Idol 2010-05-30T08:20:00Z Plenty of those albums were Bee Gees records; Dahl used to inhale helium on the air to do a mocking imitation of the band. Review | In HBO’s magnificent Bee Gees documentary, broken hearts — and icon status — can finally be mended 2020-12-09T05:00:00Z Hot air and helium balloons rose vertically and drifted. Chris Burden's 'Ode to Santos Dumont' inspires wonder, delight 2015-05-18T04:00:00Z Directly in front of me, bobbing against the exposed concrete of the hotel’s columns, is a bouquet of helium balloons in the shape of footballs with the Georgia logo on them. The wrong kind of time capsule: Notes on an afternoon inside John Portman's Bonaventure Hotel 2018-01-04T05:00:00Z A hose attached to a helium tank was hooked up to the bag, he said. Songwriter Brooks apparently kills himself in NYC 2011-05-23T00:28:08Z After that, George ends up in peril again, when he clutches too many helium balloons at once, but again he escapes his peril. The Unexpected Profundity of Curious George 2019-06-03T04:00:00Z That may sound kind of heavy, dude, but “Lysistrata Jones” is mostly pure helium. | 'Lysistrata Jones': ?Lysistrata Jones? at Walter Kerr Theater - Review 2011-12-15T03:05:04Z And while most balloon installers use air and mechanical fixtures rather than helium to keep their work in place, those who do need helium will find it’s harder than ever to find. How Balloons Blew Up 2022-03-24T04:00:00Z Giant helium balloons, Seafair royalty, dancing horses, military bands and hydroplanes will be part of the 65th annual Seattle summer tradition. Weekend Highlights: Seafair Torchlight Parade, arts in Bellevue 2014-07-24T04:00:00Z SEOUL, South Korea — Growing up here in the 1970s, Kyungah Ham would occasionally find propaganda leaflets sent from North Korea via helium balloons. An Artist Unites North and South Korea, Stitch by Stitch 2018-07-26T04:00:00Z Giant helium balloons, drill teams, equestrian units, clowns, pirates, bands, 7:30 p.m. Community calendar 2012-07-25T17:48:06Z It was pink and at least partly full of helium. Review: Taylor Mac’s 24-Hour Concert Was One of the Great Experiences of My Life 2016-10-10T04:00:00Z Three hungry adults and two occasionally picky children managed to eat quite well for about $45; helium balloons for the kids were free. Sleeping Under the Stars in Brooklyn 2010-05-12T03:00:00Z The AP reports Brooks' body was found in his New York City apartment by a friend, with a plastic bag tied around his head, connect to a helium tank. 'You Light Up My Light' songwriter Brooks dies awaiting rape trial 2011-05-23T19:54:35Z “We keep a helium tank in the basement,” she said. Art Was There, Through Courtship, Love and Labor 2018-03-21T04:00:00Z Complex elements are forged inside the cores of stars by the nuclear fusion of more basic elements such as hydrogen and helium atoms. Paging Neil deGrasse Tyson: Fossil galaxy may be relic of baby universe 2014-04-09T12:30:00Z Then Fallon peppered the 69-year-old with various questions, all of which she answered in a lovely, affected chipmunk voice as is wont to happen after a bit of helium inhalation. Helen Mirren, not her accent, takes a hit of helium with Fallon 2015-03-31T04:00:00Z As immediate as it is a keeper, Don't Hold the Wall grabs from the near east and the southern hemisphere; crickets chirp in the background, and a sped-up helium sample quacks like it's 1999. Justin Timberlake: The 20/20 Experience – review 2013-03-17T00:05:18Z They may spend most of their lives burning hydrogen into helium, but in time they can burn carbon, oxygen, and silicon too. "The Big Bang Theory" and real science, from Leonard's wedding vows to the "Time Machine" prop 2019-05-16T04:00:00Z So I took it and put a little helium in there, and the next thing you know, we got this.” The Stars of ‘Animaniacs’ Speak for Themselves 2020-11-17T05:00:00Z The medical examiner's office ruled the songwriter died of asphyxiation by helium. Songwriter Brooks is found dead 2011-05-23T09:45:02Z "Apart from a high-pitched voice, potential health effects of helium are dizziness, headache and suffocation," says advice published by the UK's Public Health Agency. Child star in coma after TV stunt 2015-02-05T05:00:00Z Conceived by Simon Faithfull, Fake Moon is a huge, white helium balloon that travels in an arc across College Green, close to Bristol's waterfront. In Between Time – review 2013-02-19T18:00:55Z Later we’re buying a helium balloon, so she can watch something fly away. How do I explain death of our cat to my two-year-old? | Eva Wiseman 2017-02-19T05:00:00Z Height, in feet, attained by Moorman in a 1976 performance of “Sky Kiss” in Sydney in which she played cello while being lifted by several helium balloons. A musical tribute to an unconventional — and unclothed — cellist 2015-06-17T04:00:00Z Why did zeppelins use hydrogen instead of helium, the American airship gas of choice? When Airplanes and Zeppelins Competed to Conquer the Skies 2020-04-28T04:00:00Z He expels breath so deeply and so often that by the end of the movie he must be as deflated as a helium balloon a week after the birthday party. REVIEW: In Enemy, Jake Gyllenhaal Sees Double 2014-03-13T17:07:23Z As always, don't try this at home, kids, because as the National Inhalant Prevention Coalition says, "Inhaling helium sounds like fun until someone dies." Morgan Freeman on helium: Just as freaky as it sounds 2014-05-23T04:00:00Z The pillow I slept on in the scene was actually a large helium balloon. Missing Theater Under the Stars (Even the Bugs and the Rain) 2020-07-16T04:00:00Z Jamie D. Ramsay’s cinematography casts a sullen thundercloud over exterior and interior shots alike, a child’s party balloons in one early scene appearing filled not with helium but with foreboding. ‘She Will’ Review: Payback Is a Witch 2022-07-14T04:00:00Z “Officials pulled the plug yesterday right when we were about to get helium,” grumbled Joe Kennedy, the blimp baby’s guardian, across the street from the World War II Memorial on Thursday morning. Evening in America: What it felt like on Trump’s Fourth of July 2019-07-05T04:00:00Z “They were magical things to me, a bit like supercritical helium held with your bare hands.” Paul West, Writer Who Shoveled Absurdity Into His Books, Dies at 85 2015-10-21T04:00:00Z People still voted him through after he performed Bohemian Rhapsody in the style of a slowly deflating helium gonk, so there's no telling what might happen. The Voice: does anyone really deserve to win the final? 2012-06-01T15:13:17Z But inevitably the helium, too, is used up. When the universe began 2012-07-22T12:00:00Z On May 16, 2019, Dr. Fields, filled the backyard with roses, and gold foil helium balloon letters that read “MARRY ME?” A Labor of Love Side by Side 2021-06-25T04:00:00Z The dark circular hood of a ceiling security camera is replaced by the sight of a gray balloon expanding while being filled with helium. ‘Los Conductos’ Review: Lost Souls Above Medellín 2022-04-28T04:00:00Z Along with helium, xenon and krypton, neon was first extracted from the air in the late 1890s. 100 years of neon 2011-08-27T23:05:03Z An urgent request to the helium suppliers of New York: Can you please deliver as many canisters of the stuff as you can spare to City Center, posthaste? ‘The Band Wagon’ Stars Brian Stokes Mitchell 2014-11-09T05:00:00Z It’s a helium performance, in which jokes land lightly, mugging is gentle, and songs are delivered with almost conversational casualness. Two Sides of Sondheim in the Berkshires 2010-07-06T21:36:00Z The current record for the longest duration flight by helium balloons is held by Jonathan Trappe for a flight of 13 hours, 36 minutes, 57 seconds over North Carolina in April 2010. Lawn chair pilot to fly again 2012-06-18T15:33:00Z When the email arrived, it said a shot-like sound had been made by a box of helium bulbs falling from a shelf in the chemistry lab. The school shooting that wasn’t: When a lockdown isn’t worth it 2014-02-17T21:00:00Z The other tries sending a hamburger to a woman back home — by attaching it, in a plastic bag, to a bunch of helium balloons and launching it into a northward-blowing breeze. Review: ‘Fortune Smiles,’ Stories From Dark Places, by Adam Johnson 2015-09-07T04:00:00Z We stopped in Central Park and he bought a handful of helium balloons, which he let float one by one into an impossibly sunny sky. Sydney H. Schanberg was a dogged journalistic role model; journalism will miss him 2016-07-09T04:00:00Z They all sound like they've been breathing helium, and I couldn't wait to get away. 'Alvin and the Chipmunks: Chipwrecked': a forgettable trip 2011-12-14T18:25:03Z It all started when Fallon asked if her accent would sound the same after sucking a bit of helium. Helen Mirren, not her accent, takes a hit of helium with Fallon 2015-03-31T04:00:00Z Later episodes promise that he’ll run through fire and go aloft borne by ordinary helium balloons. Review: ‘Outrageous Acts of Danger’ Makes Science Life-Threatening 2017-06-20T04:00:00Z In the living room the decorator created "the impression that the room was floating like a helium balloon," he says, "with the Hudson River below and clouds above." An Art-Filled Aerie In New York City 2014-07-10T04:00:00Z Jimmy Fallon’s boyish mischief got the best of him last night as he welcomed Helen Mirren to the “Tonight Show” and asked her to suck helium balloons with him. Helen Mirren speaking with a helium voice is the video clip you never knew you needed 2015-03-31T04:00:00Z It’s balloons for the children, en masse, Now Cassandra turns 3, little lass, But with helium leaking There’s lots of high squeaking. Style Invitational Week 1452: As the word turns 2021-09-02T04:00:00Z There was just enough helium in it to see why Archie called her a “dingbat,” and just enough control to remind us, often, that she was a dingbat like a fox. She Who Would Not Be Stifled: RIP Jean Stapleton, All in the Family‘s Edith 2013-06-02T01:35:26Z What follows, unfortunately, lets the helium out of the balloon, as the second act mostly dispatches with comedy entirely. Review: ‘Barbecue,’ an Intervention With Love, Insults and Whiskey 2015-10-08T04:00:00Z Parade with Seafair royalty, Clowns and Pirates, floats, marching bands, giant helium balloons, drill teams, equestrian units, 7:30 p.m. Bellevue arts fests, Torchlight Parade | Weekend Preview 2013-07-24T22:27:04Z “Like these families of copper living next to helium, but don’t trust them because they’re gassy,” he said. How ‘Elemental’ Breathed Life Into Fire, Water, Earth and Air 2023-06-20T04:00:00Z Maybe the hit cartoon Despicable Me, which earned $15.5 million in its fourth weekend, sucked too much helium out of the kids'-party balloon. Box Office Weekend: Inception Schmacks the Schmucks 2010-08-01T20:50:00Z An award went to Momo Wang, whose whimsical, folksy knits and prints were shown with helium balloons as accessories, not least attached to braids that floated upward. Style: Feting an Ending, and a New Start 2011-06-06T12:35:07Z Parents clamp their hands over their ears whenever they hear SpongeBob’s helium voice, let alone his nasal laugh. How ‘SpongeBob SquarePants’ invaded our brains 2018-06-07T04:00:00Z Sam Zuckert, 18, a high school senior in Greenwich, Conn., ordered three dozen pink helium balloons, which he tied with ribbons to the winding staircase in the foyer of the girl’s house. Noted: The Prom ‘Ask’ Becomes a Big Production 2013-05-01T21:04:33Z The sky is full of dead men, drifting in the blackness like helium balloons.” Have personal essays gotten too personal? 2013-03-17T17:00:00Z It's as if Packer himself couldn't completely resist the helium platitudes of Napoleon Hill. The Unwinding: An Inner History of the New America by George Packer – review 2013-06-21T07:01:01Z It appears as if it might have been whipped up out of discarded plastic bags and helium, like some homemade zeppelin. Review: Jason Craig’s ‘Longyarn’ Features a Mom Who Won’t Shut Up 2016-01-15T05:00:00Z After the holiday, Murray recruited colleagues and friends to help turn his drawing into a 20-foot-tall helium blimp. Liberal activists loved the Trump Baby blimp. Then they started fighting over it. 2018-10-05T04:00:00Z “The Queen” obliged and, not only that, but she also suggested a do-over of her 2006 Oscars acceptance speech in her looney helium voice. Helen Mirren speaking with a helium voice is the video clip you never knew you needed 2015-03-31T04:00:00Z All around their house are ever-so-slightly deflating helium balloons, a concoction of cards and flowers from well-wishers just about to go on the turn. Prunella Scales and Timothy West: Dementia won't break our 60-year love affair 2023-11-14T05:00:00Z Stars like the sun fuse hydrogen into helium in their core. See JWST’s Spectacular New View of the Crab Nebula 2023-11-10T05:00:00Z Researchers from Lancaster University in the UK have discovered how superfluid helium 3He would feel if you could put your hand into it. What a '2D' quantum superfluid feels like to the touch 2023-11-02T04:00:00Z After serving as the world’s largest provider of helium for nearly a century, the U.S. government is close to bowing out of the market. Impending sale of scientifically critical helium sparks worries 2023-11-05T04:00:00Z Traced to insufficient insulation in a critical wiring joint, the short damaged electrical connections and caused a helium leak that would have degraded cooling systems. First plasma fired up at world’s largest fusion reactor 2023-10-31T04:00:00Z When people hear of a helium leak, they likely imagine a comical scenario involving party balloons and high-pitched voices. Like a saggy balloon, Earth's core is leaking helium, a new analysis finds 2023-10-24T04:00:00Z Like Jupiter, WASP-17b appeared to be mostly made from hydrogen and helium. JWST Detects Quartz Crystals in an Exoplanet’s Atmosphere 2023-10-20T04:00:00Z In the case of stars, the paper notes that just two major elements -- hydrogen and helium -- formed the first stars shortly after the big bang. Scientists, philosophers identify nature's missing evolutionary law 2023-10-16T04:00:00Z Aiming to recoup costs, it began emptying its vast underground reservoir of the gas in the 1990s and has now put the whole federal helium system up for sale. Impending sale of scientifically critical helium sparks worries 2023-11-05T04:00:00Z The officer said the man initially told the officer that the gas was helium, but he later admitted it was laughing gas. Georgia police arrest pair for selling nitrous oxide in balloons after concert 2023-09-26T04:00:00Z We may think we know a lot about the Earth's core, but new research is consistently surprising us, not least of which is our mysterious core is leaking helium like a saggy balloon. Like a saggy balloon, Earth's core is leaking helium, a new analysis finds 2023-10-24T04:00:00Z In this context, "heavy elements," means everything heavier than hydrogen and helium. Astronomers discover newborn galaxies with the James Webb Space Telescope 2023-09-22T04:00:00Z Those earliest stars used hydrogen and helium to make about 20 heavier chemical elements. Scientists, philosophers identify nature's missing evolutionary law 2023-10-16T04:00:00Z Scientists worry it will send already stiff prices soaring, especially after the government ended a program that sold helium to federally funded researchers at a discount. Impending sale of scientifically critical helium sparks worries 2023-11-05T04:00:00Z Then they added enough helium to the balloon to take it aloft, attached a camera and GPS sensor, and released it into the sky. It’s Time to Engineer the Sky 2023-09-20T04:00:00Z Helium is one of the most abundant elements in the entire universe, second only to hydrogen, so it's no surprise there was helium around when Earth first formed billions of years ago. Like a saggy balloon, Earth's core is leaking helium, a new analysis finds 2023-10-24T04:00:00Z It must be cooled to near absolute zero with liquid helium, but it can produce electron pulses far faster. U.S. regains the lead in friendly x-ray laser “arms race” 2023-09-18T04:00:00Z The Great Red Spot and many details of the turbulent atmosphere, primarily composed of hydrogen and helium gas, are clearly visible, including several smaller storms. Astronomy Photographer of the Year: Huge plasma arc wins 2023-09-14T04:00:00Z In addition to being lighter than air, helium is staunchly unreactive, making it useful for manufacturing sensitive products such as computer chips. Impending sale of scientifically critical helium sparks worries 2023-11-05T04:00:00Z At the time, more than 13 and a half billion years ago, almost all the visible matter in the universe was comprised of hydrogen with some helium. This is what the first stars looked like as they were being born 2023-09-14T04:00:00Z Geologists believe that the most likely explanation for the presence of all this helium is that there is a literal helium leak in Earth's core. Like a saggy balloon, Earth's core is leaking helium, a new analysis finds 2023-10-24T04:00:00Z Neptune itself is a gas giant 57 times Earth's size and covered in a thick atmosphere of hydrogen and helium, an icy world far away from its Sun. Newly discovered steel-dense exoplanet is result of colliding with and consuming its siblings: study 2023-09-06T04:00:00Z Eventually, the Moon may provide economic benefits based on the natural resources that can be found there, such as water, helium-3 and rare Earth elements. India’s Chandrayaan-3 landed on the south pole of the Moon. Here's why that matters 2023-08-30T04:00:00Z As a result, helium extraction is typically a byproduct of fossil fuel production, which has made resource development spotty. Impending sale of scientifically critical helium sparks worries 2023-11-05T04:00:00Z Everything heavier than helium is considered a “metal” in astronomy, and these new elements were generated for the first time as the earliest stars erupted in supernovae and scattered their contents across the cosmos. This is what the first stars looked like as they were being born 2023-09-14T04:00:00Z These isotope ratios helped the scientists deduce that the helium did not come from Earth's mantle, but must have originated from the core. Like a saggy balloon, Earth's core is leaking helium, a new analysis finds 2023-10-24T04:00:00Z These same features are what led the astronomer Cecilia Payne-Gaposchkin to determine that stars were largely made of hydrogen and helium. The Colors of Stars, Explained 2023-08-25T04:00:00Z That scenario starts soon after the big bang, 13.7 billion years ago, as clumps of the mysterious dark matter that pervades the universe draw in primordial gases—mostly hydrogen and helium. Giant black hole formed puzzlingly fast at dawn of cosmos 2023-08-22T04:00:00Z The agency did so at below market rates, which some say discouraged private companies from expanding their own helium operations. Impending sale of scientifically critical helium sparks worries 2023-11-05T04:00:00Z For the first stars to ignite, gas had to accumulate in dense enough pockets to force hydrogen atoms to fuse into helium, releasing heat and energy. This is what the first stars looked like as they were being born 2023-09-14T04:00:00Z "We propose that the magnetized Wolf-Rayet star formed by the merger of two lower-mass helium stars," the team wrote in the study. Magnetars and “zombie” stars: New type of ultrahigh magnetic star discovered 2023-08-18T04:00:00Z After a star exhausts its hydrogen, it will start burning other fuels, such as helium, but this gains the star only a modest stay of execution. Rare ‘Pinwheel’ Stars Are a Beautiful Astronomical Puzzle 2023-08-18T04:00:00Z Such stars have exhausted their hydrogen fuel and instead burn helium, which makes them shine brighter and raises intense stellar winds that can blow off their outer layers. This Bizarre Star Could Become One of the Strongest Magnets in the Universe 2023-08-17T04:00:00Z Today, helium is produced primarily in just four countries—the United States, Qatar, Algeria, and Russia—and is distributed by a handful of multinational companies. Impending sale of scientifically critical helium sparks worries 2023-11-05T04:00:00Z The second died soon after getting to space, when its helium coolant was accidentally dumped. Revolutionary x-ray sensor to probe workings of black holes and supernovae 2023-08-15T04:00:00Z He claimed to have been the first person to find helium on Earth, in 1868, using spectroscopy on Vesuvius’s fumaroles; helium had only been detected on the sun at that time. A Defiant Volcanologist Survived 5 Eruptions while Living on Mount Vesuvius 2023-08-16T04:00:00Z It was mostly made of hydrogen and helium atoms. Tracing Our Stellar Ancestors 2023-07-05T04:00:00Z Practical superconductors could also lead to smaller, cheaper MRIs, which might no longer need helium to be cooled down — good news given we could one day run out of helium. Energy breakthrough or resistance letdown? Here's what's so super about superconductors 2023-08-10T04:00:00Z As the only large-scale storage facility in the world, the federal helium reserve can release the gas to buffer market shocks the same way that the U.S. Impending sale of scientifically critical helium sparks worries 2023-11-05T04:00:00Z It has a revamped attitude control system, redesigned coolant pipework, and a backup mechanical cooler that could allow it to operate after its helium runs out in 3 years. Revolutionary x-ray sensor to probe workings of black holes and supernovae 2023-08-15T04:00:00Z This along with inventory shortages and tight supplies of helium due to global supply chain disruptions hurt the party supplier further. Party City, Creditors in talks to spin off balloon business, Bloomberg reports 2023-08-04T04:00:00Z In our recent study, my collaborators and I found that the telescope’s new measurement of the amount and type of helium in faraway galaxies may offer a solution to this long-standing mystery. Helium in Distant Galaxies May Help Explain Why the Universe Exists 2023-07-28T04:00:00Z Latin dancing horses, U.S. military representatives, giant helium balloons and more will wind down Fourth Avenue in downtown Seattle on Saturday, July 29. 2023 Torchlight Parade and more from Seafair 2023-07-27T04:00:00Z The U.S. government sold crude helium from a strategic reserve until a last auction in 2018. Impending sale of scientifically critical helium sparks worries 2023-11-05T04:00:00Z On the same day Onnes discovered both the phase transition to a state of superconductivity in mercury and the phase transition to the state of superfluidity in helium. The Most Surprising Discoveries in Physics 2023-07-27T04:00:00Z After a white dwarf forms, its heavier elements are thought to sink to the star's core while its lighter elements - hydrogen being the lightest, followed by helium - float to the top. Introducing Janus, the exotic 'two-faced' white dwarf star 2023-07-21T04:00:00Z Physicists believe that just one second after the Big Bang, the nuclei of light elements like hydrogen and helium began to form. Helium in Distant Galaxies May Help Explain Why the Universe Exists 2023-07-28T04:00:00Z In the early universe, dark stars could have formed from the collapse of helium and hydrogen clouds made in the big bang. JWST Might Have Spotted the First Dark Matter Stars 2023-07-20T04:00:00Z Researchers worry that disruptions from a planned sale of the entire reserve system could exacerbate an ongoing helium shortage and send prices even higher. Impending sale of scientifically critical helium sparks worries 2023-11-05T04:00:00Z This heat in turn would prevent dark stars from turning into modern stars — the bright, burning kind fueled by nuclear fusion — and, instead, to become enormous clouds of molecular hydrogen and helium. Dark matter power: James Webb telescope may have proven the existence of dark stars 2023-07-16T04:00:00Z This layered structure is believed to be destroyed at a certain stage in the evolution of some white dwarfs when a strong mixing blends the hydrogen and helium together. Introducing Janus, the exotic 'two-faced' white dwarf star 2023-07-21T04:00:00Z The physics community’s most widely accepted theory on the formation of these nuclei tells us that neutrinos and antineutrinos played a fundamental role in the creation of, in particular, helium nuclei. Helium in Distant Galaxies May Help Explain Why the Universe Exists 2023-07-28T04:00:00Z The other particles would have hit the hydrogen and helium and transferred their energy to this matter, which would have heated up the cloud and fueled the star’s formation and continued growth. JWST Might Have Spotted the First Dark Matter Stars 2023-07-20T04:00:00Z Private, high-grade helium prices are closely guarded, but U.S. Impending sale of scientifically critical helium sparks worries 2023-11-05T04:00:00Z "The discovery of a new type of star, made of hydrogen and helium but powered by dark matter, would be a huge advance." Dark matter power: James Webb telescope may have proven the existence of dark stars 2023-07-16T04:00:00Z Janus may represent a white dwarf in the midst of this transitional blending process, but with the puzzling development of one side being hydrogen while the other side is helium. Introducing Janus, the exotic 'two-faced' white dwarf star 2023-07-21T04:00:00Z As the universe cooled, hydrogen, helium and other elements formed from these protons and neutrons. Helium in Distant Galaxies May Help Explain Why the Universe Exists 2023-07-28T04:00:00Z These stars would have formed at the center of “minihaloes,” which were early protogalaxies that existed 200 million years after the Big Bang before the advent of elements heavier than helium and hydrogen. JWST Might Have Spotted the First Dark Matter Stars 2023-07-20T04:00:00Z Scientists often find themselves on the sharp end of helium price spikes and, as small consumers, sometimes can’t get any helium at all. Impending sale of scientifically critical helium sparks worries 2023-11-05T04:00:00Z "The discovery of a new type of star, made of hydrogen and helium but powered by dark matter, would be a huge advance," Freese added, echoing the enthusiasm in her paper. Dark matter power: James Webb telescope may have proven the existence of dark stars 2023-07-16T04:00:00Z If the magnetic field is stronger on one side than the other, as is often the case with celestial objects, one side could have less mixing of elements, becoming hydrogen heavy or helium heavy. Introducing Janus, the exotic 'two-faced' white dwarf star 2023-07-21T04:00:00Z So the fewer the neutrons available in the early universe, the less helium would be produced. Helium in Distant Galaxies May Help Explain Why the Universe Exists 2023-07-28T04:00:00Z The “smoking gun” for a dark star would be a particular hiccup in the electromagnetic spectrum where light is absorbed by a particular isotope of helium only in dark stars, not in galaxies. JWST Might Have Spotted the First Dark Matter Stars 2023-07-20T04:00:00Z Liquid helium is needed to cool the machines’ magnets and, in some cases, the samples themselves. Impending sale of scientifically critical helium sparks worries 2023-11-05T04:00:00Z And the dust that astronomers call anything that's not a gas — hydrogen, helium, you know — the dust has the carbon that makes up organic molecules. James Webb one year later: An astronomer discusses her favorite views of our universe 2023-07-12T04:00:00Z We are facing a global shortage of the liquid helium that keeps the magnets in MRI machines running. Some of Earth’s Most Famous Art Started with Stardust 2023-07-04T04:00:00Z They do this by looking specifically at galaxies that are rich in light elements like hydrogen and helium. Helium in Distant Galaxies May Help Explain Why the Universe Exists 2023-07-28T04:00:00Z He also isolated hydrogen, helium and neon from the air.” 50, 100 & 150 Years Ago: July 2023 2023-07-01T04:00:00Z There is also the matter of negotiating a new contract with the Cliffside Helium Enrichment Unit—a privately owned facility that is necessary for processing helium at the reserve. Impending sale of scientifically critical helium sparks worries 2023-11-05T04:00:00Z One was a red giant, which burns hydrogen until it heats up so much that its helium core ignites and it starts to shrink. 8 Ursae Minoris b: Scientists unlock mystery of planet that escaped death 2023-06-28T04:00:00Z In a poetic parallel to charcoal’s birth in fire, most of the carbon in the universe is synthesized in the cosmic furnace of stars through the fusion of helium nuclei. Some of Earth’s Most Famous Art Started with Stardust 2023-07-04T04:00:00Z Last year, the Subaru Collaboration – a group of Japanese scientists working on the Subaru telescope – released data on 10 galaxies far outside of our own that are almost exclusively made up of hydrogen and helium. Helium in Distant Galaxies May Help Explain Why the Universe Exists 2023-07-28T04:00:00Z By the time most red giants dip into their helium supply, they have already ballooned in size by orders of magnitude. The ‘Forbidden Planet’ That Escaped a Fiery Doom 2023-06-28T04:00:00Z CGA is asking for a 3-year delay, which is how long it will take to get 45 million cubic meters of already purchased crude helium out of the ground, according to Garvey. Impending sale of scientifically critical helium sparks worries 2023-11-05T04:00:00Z The other was an older star, a white dwarf burning helium. 8 Ursae Minoris b: Scientists unlock mystery of planet that escaped death 2023-06-28T04:00:00Z Helium’s origins go back to just a few minutes after the big bang, when hydrogen, helium and a bit of lithium were produced during what is called big bang nucleosynthesis. Some of Earth’s Most Famous Art Started with Stardust 2023-07-04T04:00:00Z Importantly, they found less helium than the previously accepted theory predicted. Helium in Distant Galaxies May Help Explain Why the Universe Exists 2023-07-28T04:00:00Z And she says, "No, no, I mean the entire star. Inside. They’re entirely hydrogen and helium." This Astronomer Discovered What the Stars Were Made Of, And Few Believed Her Discovery 2023-06-22T04:00:00Z In a few years, Garvey expects the helium shortage to ease and prices to drop. Impending sale of scientifically critical helium sparks worries 2023-11-05T04:00:00Z The researchers believe that the helium core in the red giant was ignited when it swallowed its companion star, putting a premature stop to its vigorous expansion. 8 Ursae Minoris b: Scientists unlock mystery of planet that escaped death 2023-06-28T04:00:00Z That is why helium gets its name from Helios, the Greek sun god. Some of Earth’s Most Famous Art Started with Stardust 2023-07-04T04:00:00Z With this new result, my collaborators and I worked backward to find the number of neutrinos and antineutrinos necessary to produce the helium abundance found in the data. Helium in Distant Galaxies May Help Explain Why the Universe Exists 2023-07-28T04:00:00Z At this point the atoms are colder than liquid helium. Physicists Make Matter out of Light to Find Quantum Singularities 2023-06-18T04:00:00Z High prices have also encouraged a growing number of operations that target helium as the primary product—not as a byproduct of natural gas. Impending sale of scientifically critical helium sparks worries 2023-11-05T04:00:00Z The other is in a gilded frame and hangs behind the easel — not just on the wall but skied, way up at the edge of the ceiling, like a helium balloon floating away. Review: A striking Danish art show at the Getty unpacks what it means to be a nation in turmoil 2023-06-14T04:00:00Z Once the universe had cooled and calmed sufficiently about 400,000 years after the big bang, the first atoms were able to form: hydrogen and helium. At Last, Astronomers May Have Seen the Universe’s First Stars 2023-06-13T04:00:00Z In this study, my collaborators and I proved that this new measurement of helium is consistent with there being more neutrinos then antineutrinos in the early universe. Helium in Distant Galaxies May Help Explain Why the Universe Exists 2023-07-28T04:00:00Z The fusion of two hydrogen atoms to make helium is the main process that powers the sun and other stars. What Is the Future of Fusion Energy? 2023-06-05T04:00:00Z CEO Chris Bakker says the geopolitical risks of the helium market prompted his team to look for more North American sources. Impending sale of scientifically critical helium sparks worries 2023-11-05T04:00:00Z The technical glitches are most likely communication errors between computers that control a helium relief valve, officials say. South Korea cancels third launch of homegrown rocket due to technical problems 2023-05-24T04:00:00Z Picking apart the light at the galaxy’s edge in a process called spectroscopy, they found hints of helium that could be linked to small pockets of Population III stars in the galaxy’s outer regions. At Last, Astronomers May Have Seen the Universe’s First Stars 2023-06-13T04:00:00Z If you look at the periodic table, you will see that hydrogen and helium are the only two elements in the first row. Concepts of Biology 2013-04-25T00:00:00Z The results also showed the presence of helium gas “in commercial concentrations,” the company said. Australian company says has found oil, gas in Zimbabwe 2023-05-08T04:00:00Z Natural gas from fracked shale rocks often contains little helium so Bakker’s team targeted a formation in Montana similar to a conventional natural gas reservoir but filled with volcanic gases, including helium. Impending sale of scientifically critical helium sparks worries 2023-11-05T04:00:00Z They chose this place because it has a very low concentration of metals — which astronomers define as any element heavier than hydrogen and helium. JWST Spots Planetary Building Blocks In A Surprising Galaxy 2023-05-04T04:00:00Z The merger of two stars typically produces lots of superhot hydrogen and helium, which leaves bright emission lines in the spectrum. A dying star consumes a planet, foreshadowing Earth’s fate 2023-05-03T04:00:00Z Hydrogen and helium are the only two elements that have the lowest shell and no other shells. Concepts of Biology 2013-04-25T00:00:00Z In theory, the very first stars in the universe would have been composed of pure hydrogen and helium, the first elements to emerge from the Big Bang. Back Then, Baby Galaxies. Next, a Super-Mega Galactic Cluster? 2023-04-29T04:00:00Z Once the helium is extracted, the reservoir could be used to store other gases, but for now, the sprawling government asset is beset by maintenance issues and litigation. Impending sale of scientifically critical helium sparks worries 2023-11-05T04:00:00Z The lasers trigger an implosion, creating extreme heat and pressure that drive the hydrogen isotopes to fuse into helium, releasing additional energy. This Pioneering Nuclear-Fusion Lab Is Gearing up to Break More Records 2023-04-28T04:00:00Z Then planets were found around stars more like our own, “normal” ones stably fusing hydrogen into helium in their cores. Most Planets in the Galaxy Orbit Stars You Can’t Even See 2023-04-10T04:00:00Z Stars are nature’s fusion reactors, shining from the energy released by fusing hydrogen to form helium atoms. Rare, Dust-Shrouded Dying Star Revealed in New JWST Image 2023-03-17T04:00:00Z The first known superconductors had to be cooled with liquid helium to temperatures only a few degrees above absolute zero. Controversy Surrounds Blockbuster Superconductivity Claim 2023-03-10T05:00:00Z And perhaps that made the hype for this special feel special: All that helium inside the balloon. Perspective | Chris Rock’s Netflix special was a gimmick. The crowd didn’t care. 2023-03-06T05:00:00Z Alternative fuel made of protons and boron generates no neutrons and produces only harmless helium, but requires a temperature of 3 billion degrees Celsius—200 times the heat of the Sun’s core—to burn. News at a glance: Monkey shipments, a controversial visa, and support for geoengineering research 2023-03-01T05:00:00Z That’s because many of these innocuous party favors are filled with helium for loft and then released, either intentionally or by accident, to float gracefully away. Editorial: Balloon bans are the result of humans acting irresponsibly with their stuff 2023-02-26T05:00:00Z Once massive stars have burned through all their hydrogen, they begin fusing helium into heavier elements—through a more energetic fusion reaction that raises powerful stellar winds. Rare, Dust-Shrouded Dying Star Revealed in New JWST Image 2023-03-17T04:00:00Z Once, it was tucked into a bill to shore up the nation’s helium supply. These rural schools face a financial 'cliff.’ Will partisan bickering cut off a lifeline? 2023-02-22T05:00:00Z The Laguna Beach City Council is expected to vote Tuesday on the proposal to ban in public the popular mainstay of birthday and graduation parties, whether inflated with helium or not. California beach city weighs balloon ban to protect coast 2023-02-21T05:00:00Z And whenever he performed during the show - including an extempore rap performance while inhaling helium from a balloon - fans would celebrate on social media for days. MC Stan wins Bigg Boss: Indian rap royalty finds new home on reality TV 2023-02-16T05:00:00Z These latex balloons, filled with either hydrogen or helium, do not remain airborne for long; they burst as a result of changes in pressure as they ascend. Why We're Suddenly Spotting Spy Balloons 2023-02-14T05:00:00Z These balls of plasmic hydrogen and helium gas not only blast heat and light, they come in a stunning array of colors, chemical composition and size. What it looks like when a black hole eats a star 2023-02-10T05:00:00Z It still had helium in its nose when it fell, and state police used shotguns - about 100 shots - to deflate it. China balloon: Many questions about suspected spy in the sky 2023-02-04T05:00:00Z He suggested banning portable helium tanks for the public, barring balloon releases and prohibiting balloons on the beach, rather than an all-or-nothing approach. California beach city weighs balloon ban to protect coast 2023-02-21T05:00:00Z It still had helium in its nose when it fell, and state police used shotguns — about 100 shots — to deflate it. China balloon: Many questions about suspected spy in the sky 2023-02-03T05:00:00Z Government organizations also use tethered helium balloons, called aerostats, as platforms for their radar systems. Why We're Suddenly Spotting Spy Balloons 2023-02-14T05:00:00Z The helium balloons were first used in Iraq in 2004 and have also been used to monitor the United States’ southern border. A Brief History of Spying With Balloons 2023-02-03T05:00:00Z The supplier of oxygen, helium and other gases to hospitals and industry reported weak first-quarter financial results. Meta Platforms, Allegiant rise; Qorvo, Canada Goose fall 2023-02-02T05:00:00Z But Tolman noticed that the ratio of hydrogen and helium — the two most abundant elements in the universe — could not have happened in a static universe. Déjà Vuniverse: Why some physicists believe we could be living in a Groundhog Day universe 2023-02-02T05:00:00Z Party City for years has faced increased competition from Walmart and Target and that pressure has intensified in an era of rising prices, including for helium used in party balloons, and slowing consumer demand. Party City, amid rising prices, seeks bankruptcy protection 2023-01-18T05:00:00Z The cluster has relatively low concentrations of elements heavier than hydrogen and helium. James Webb telescope traces arcs of dusty star formation 2023-01-12T05:00:00Z In one of his last actions, Nez vetoed legislation Monday to expand oil and gas exploration and development, including for helium, on the reservation. Nygren to be sworn in as next Navajo Nation president 2023-01-09T05:00:00Z The synthesis of the first elements—hydrogen, helium and lithium—occurred roughly three minutes after the birth of the universe. How Star Collisions Forge the Universe’s Heaviest Elements 2023-01-09T05:00:00Z Seconds before kickoff, somebody released a silver helium balloon shaped like the number three. After days of grief, worry and finally hope, the Bills played football again 2023-01-08T05:00:00Z The hydrogen atoms fuse, releasing a tremendous amount of energy while producing a helium nucleus and a neutron. See how lasers led to a nuclear fusion milestone Astronomers refer to "metals" when discussing all elements heavier than hydrogen and helium. James Webb telescope traces arcs of dusty star formation 2023-01-12T05:00:00Z Under the right conditions, atoms fuse together to create helium and, in the process, lose a bit of mass. Opinion | Fusion power is tantalizing, but it won’t save the planet 2022-12-14T05:00:00Z This process continues today and accounts for all the elements from helium on the light end, with two protons per atom, all the way up to iron, which has 26 protons in its atomic nucleus. How Star Collisions Forge the Universe’s Heaviest Elements 2023-01-09T05:00:00Z This heated up the pellet, causing it to implode, fuse into helium and release a blast of energy. Turning Sci-fi Into Reality 2022-12-14T05:00:00Z They combine to create helium and other light elements, converting some of the mass to energy. U.S. announces milestone on fusion energy, sparking hopes for clean power 2022-12-13T05:00:00Z It’s the thermonuclear reaction that powers the sun and other stars — the fusing of hydrogen atoms into helium. Your Wednesday Briefing: A Nuclear Fusion Breakthrough 2022-12-13T05:00:00Z The pulse of energy caused the capsule to collapse, creating temperatures only seen in stars and thermonuclear weapons, and the hydrogen isotopes fused into helium, releasing additional energy and creating a cascade of fusion reactions. Nuclear Fusion Lab Achieves ‘Ignition’: What Does It Mean? 2022-12-13T05:00:00Z When two atoms of a light element such as hydrogen are heated and combine to form a single heavier element such as helium, the chemical reaction produces massive amounts of energy which can be captured. What is nuclear fusion and how does it work? 2022-12-13T05:00:00Z The sun’s massive gravitational pull constantly compresses hydrogen atoms and fuses them into helium, releasing bursts of energy. Turning Sci-fi Into Reality 2022-12-14T05:00:00Z But getting hydrogen ions to fuse into helium and release energy requires temperatures of more than 100 million degrees Celsius—conditions that are hard to achieve and sustain. With historic explosion, a long sought fusion breakthrough 2022-12-13T05:00:00Z Fusion is the thermonuclear reaction that lights up the sun and other stars — the fusing of hydrogen atoms into helium. Major Nuclear Fusion Energy Announcement: How to Watch 2022-12-13T05:00:00Z The mass of helium is slightly less than the original hydrogen atoms; thus, that difference in mass is converted into a burst of energy. Your Tuesday Briefing 2022-12-13T05:00:00Z Fusion works by pressing hydrogen atoms into each other with such force that they combine into helium, releasing enormous amounts of energy and heat. Officials to announce long-awaited fusion energy advance 2022-12-12T05:00:00Z Fusion is the thermonuclear reaction that powers the sun and other stars — the fusing of hydrogen atoms into helium. Major Fusion Energy Breakthrough to Be Announced by Scientists 2022-12-12T05:00:00Z Kittinger, then an Air Force captain and pilot, gained worldwide fame when he completed three jumps over 10 months from a gondola that was hoisted into the stratosphere by large helium balloons. Joseph Kittinger, who set longtime parachute record, dies 2022-12-09T05:00:00Z And they face chronic shortages of research-grade argon, helium, and other gases after a local supplier was bombed. Hero city: Crippled by Russian attacks, Ukraine’s science hotbed refuses to give up 2022-12-06T05:00:00Z Emerging from the primordial hydrogen and helium gas that pervaded the early universe, Population III stars would lack heavier elements, allowing them to reach humongous sizes—hundreds of times bulkier than our sun. Astronomers Grapple with JWST’s Discovery of Early Galaxies 2022-12-06T05:00:00Z Operators are still struggling this month with shortages of furniture, cookware and even helium for balloons, said Yannis Moati, CEO of the booking service Hotels by Day. After pandemic forced industry into recovery, hotels offer discounts in anticipation of recession 2022-12-05T05:00:00Z The mass of helium is slightly less than the original hydrogen atoms. Major Fusion Energy Breakthrough to Be Announced by Scientists 2022-12-12T05:00:00Z Galaxies this distant are composed mostly of hydrogen and helium, but they include smaller amounts of other elements. Webb telescope spots earliest galaxies yet, and they are cosmic oddballs 2022-11-17T05:00:00Z Where miners used to dig up gold, engineers are now sucking up precious helium and methane, even though that is also a greenhouse gas. COP27: Why South Africa will struggle to wean itself off coal 2022-11-07T05:00:00Z One clear signature of Population III stars, Whalen says, could be a specific spectral feature of helium that could only arise within stars that are hotter than about 100,000 degrees Celsius. Astronomers Grapple with JWST’s Discovery of Early Galaxies 2022-12-06T05:00:00Z In addition to making your voice sound high-pitched and funny when you inhale it, however, helium can also play a vital role in allowing MRIs to function. A helium shortage might mean you can't get the medical scans you need. Here's why 2022-11-03T04:00:00Z The implosion fuses the hydrogen into helium, creating fusion. Major Fusion Energy Breakthrough to Be Announced by Scientists 2022-12-12T05:00:00Z One lies at the upper range of what can be called a “normal” star—that is, one that shines by fusing hydrogen into helium in its core, just as our own star does. Dazzling New JWST Image Shows Dusty Stellar Spirals 2022-10-25T04:00:00Z “If you don’t take your characters’ bodies into account,” she writes, “your work is in danger of being populated by sentient, anguished helium balloons.” ‘The Hero of This Book’: Elizabeth McCracken’s witty fiction-memoir mashup 2022-10-10T04:00:00Z They tried to warm the fueling line, then use helium to pressurize it, but neither worked. NASA’s moon launch is dealt another blow, as Ian causes weeks-long delay 2022-09-26T04:00:00Z Why could a helium shortage suddenly affect our ability to create MRI images? A helium shortage might mean you can't get the medical scans you need. Here's why 2022-11-03T04:00:00Z Like the other outer Solar System giants, its atmosphere contains a lot of hydrogen and helium. Ringed Neptune captured by James Webb telescope 2022-09-21T04:00:00Z It likely started off its life with 20 or more solar masses, but eventually ran out of usable hydrogen in its core and is now instead furiously fusing helium into carbon. Dazzling New JWST Image Shows Dusty Stellar Spirals 2022-10-25T04:00:00Z They tried to fix it by warming the fill lines and pressurizing them with helium, yet the leak was too large. NASA’s Artemis Delays Fuel Controversy over Rocket Design 2022-09-20T04:00:00Z Over the next three minutes, as the cosmos expanded and cooled, the nuclei of helium and other very light elements began to form. JWST’s First Glimpses of Early Galaxies Could Break Cosmology 2022-09-14T04:00:00Z Liquid helium is essential because it cools the coils to the point that the current can run through it. A helium shortage might mean you can't get the medical scans you need. Here's why 2022-11-03T04:00:00Z Slowly, they become the marble shape we're all familiar with, but first form shields of hydrogen and helium called envelopes. A newly-discovered planet that is half-water, half-rock is straight out of science fiction 2022-09-13T04:00:00Z Fusing helium rather than hydrogen liberates much more energy, which disrupts the star’s delicate equilibrium, between its gravity trying to collapse it and its infernal heat trying to make it explode. Dazzling New JWST Image Shows Dusty Stellar Spirals 2022-10-25T04:00:00Z Indeed, like Jupiter and Saturn, Uranus and Neptune are mostly composed of hydrogen and helium. Why "diamond rain" could be normal weather across the universe 2022-09-08T04:00:00Z These giant fireballs of mostly hydrogen and helium were as yet uncontaminated by heavier elements like modern-day stars—and thus possessed significantly different properties. JWST’s First Glimpses of Early Galaxies Could Break Cosmology 2022-09-14T04:00:00Z Wald also described a "next generation of magnets" that is coming soon to new MRI machines, and which will use even less helium. A helium shortage might mean you can't get the medical scans you need. Here's why 2022-11-03T04:00:00Z This time, they used helium to pressurize the line, but this did not work either. Artemis I mission faces weeks of delay after launch is scrubbed 2022-09-03T04:00:00Z They tried that twice, in fact, and also flushed helium through the line. Fuel leak ruins NASA’s 2nd shot at launching moon rocket 2022-09-03T04:00:00Z The engineers shut off the liquid hydrogen, “close the valve used to fill and drain it, then increase pressure on a ground transfer line using helium to try to reseal it,” according to CNN. Hydrogen leak bedevils NASA engineers on second launch attempt for Artemis I 2022-09-03T04:00:00Z The exoplanet’s strong carbon dioxide signal suggests that it is enriched with elements heavier than hydrogen and helium, which typically make up stars. Webb Telescope Finds Carbon Dioxide on a Distant Exoplanet 2022-08-30T04:00:00Z In other words, the medical industry is innovating its way out of a helium shortage. A helium shortage might mean you can't get the medical scans you need. Here's why 2022-11-03T04:00:00Z Hydrogen and helium produced in the big bang are the starting materials for all the visible matter in the universe, but anything heavier was forged later in stars. Carbon dioxide detected around alien world for first time 2022-08-24T04:00:00Z They emerge when a star runs out of hydrogen fuel at its core and begins burning helium instead, releasing excess energy that causes the star to swell to 100 times or more its previous size. Astronomers Reveal New Details of How Stars Devour Planets 2022-08-23T04:00:00Z Assume the same temperature dependence for helium as for air. College Physics for AP Courses 2015-08-12T00:00:00Z Helium is isolated from natural gas by liquefying the condensable components, leaving only helium as a gas. Chemistry 2019-02-14T00:00:00Z "I do not see any significant impact on clinical MRI due to the helium shortage thanks to these advances in cryogenic technology; helium is becoming less and less relevant," Wald concluded. A helium shortage might mean you can't get the medical scans you need. Here's why 2022-11-03T04:00:00Z Finding CO2 is valuable because it is a clue to a planet’s “metallicity”—the proportion of elements heavier than helium in its makeup. Carbon dioxide detected around alien world for first time 2022-08-24T04:00:00Z Figure 2.2 Elements, such as helium, depicted here, are made up of atoms. Biology for AP Courses 2022-06-09T00:00:00Z What will be the ratio of kinetic energies and rms speeds of a nitrogen molecule and a helium atom at the same temperature? College Physics for AP Courses 2015-08-12T00:00:00Z The cost of liquid helium has deterred the widespread application of superconductors. Chemistry 2019-02-14T00:00:00Z "We will depend more and more on cryo-coolers for getting the magnets cold and less and less on helium." A helium shortage might mean you can't get the medical scans you need. Here's why 2022-11-03T04:00:00Z The four giant planets have generally similar atmospheres, composed mostly of hydrogen and helium. Astronomy 2016-10-13T00:00:00Z Hydrogen and helium are the only two elements that have the 1s and no other electron orbitals in the electrically neutral state. Biology for AP Courses 2022-06-09T00:00:00Z This operates at liquid helium temperatures and can measure magnetic fields thousands of times smaller than the Earth’s. College Physics for AP Courses 2015-08-12T00:00:00Z Not only are liquid nitrogen- cooled materials easier to handle, but the cooling costs are also about 1000 times lower than for liquid helium. Chemistry 2019-02-14T00:00:00Z Of course, there are still hundreds of older MRI machines operating today using older, more helium-intensive technology — meaning the helium shortage problem may go away eventually, but we are not there yet. A helium shortage might mean you can't get the medical scans you need. Here's why 2022-11-03T04:00:00Z Jupiter is denser than water, yet composed for the most part of two light gases, hydrogen and helium. Astronomy 2016-10-13T00:00:00Z Notice that in this Figure 2.7, helium has a complete outer electron shell, with two electrons filling its first and only shell. Biology for AP Courses 2022-06-09T00:00:00Z Subsequently, protons, helium nuclei, neutrons, and many others have been observed to exhibit interference when they interact with objects having sizes similar to their de Broglie wavelength. College Physics for AP Courses 2015-08-12T00:00:00Z A weather balloon contains 8.80 moles of helium at a pressure of 0.992 atm and a temperature of 25 °C at ground level. Chemistry 2019-02-14T00:00:00Z There are many issues with the existing helium reserves. A helium shortage might mean you can't get the medical scans you need. Here's why 2022-11-03T04:00:00Z Stellar spectra can also be used to determine the chemical composition of stars; hydrogen and helium make up most of the mass of all stars. Astronomy 2016-10-13T00:00:00Z A container of helium has a volume of 370 cubic inches under a pressure of 15 psi. Elementary Algebra 2020-04-22T00:00:00Z Figure 30.39 shows the energy levels of helium and neon, a pair of noble gases that work well together. College Physics for AP Courses 2015-08-12T00:00:00Z Each alpha particle becomes an atom of helium gas. Chemistry 2019-02-14T00:00:00Z In January there was a fire at an eastern Russian helium facility, further compromising access to helium in the United States. A helium shortage might mean you can't get the medical scans you need. Here's why 2022-11-03T04:00:00Z It does, however, change the chemical composition in its central regions where nuclear reactions occur: hydrogen is gradually depleted, and helium accumulates. Astronomy 2016-10-13T00:00:00Z Betelgeuse now mostly burns more energy-rich helium as fuel, and its outer layers have grown ruddy and puffy from the extra heat. Ancient Stargazers Saw Betelgeuse Shine a Different Color 2022-08-18T04:00:00Z The first excited state of helium is metastable and, thus, stores energy. College Physics for AP Courses 2015-08-12T00:00:00Z Unstable compounds of argon form at low temperatures, but stable compounds of helium and neon are not known. Chemistry 2019-02-14T00:00:00Z These machines not only "recycle what is there, but very little helium is stored in the device." A helium shortage might mean you can't get the medical scans you need. Here's why 2022-11-03T04:00:00Z Calculations show that the temperature and density in the inner region slowly increase as helium accumulates in the center of a star. Astronomy 2016-10-13T00:00:00Z This time the rush would be for moon metals, water and helium—materials that could become precious if rockets were to start launching out into the solar system from a lunar base station. A New Private Moon Race Kicks Off Soon 2022-08-02T04:00:00Z The gas mixture has about ten times more helium atoms than neon atoms. College Physics for AP Courses 2015-08-12T00:00:00Z This requires the use of liquid helium, which has a boiling temperature of 4 K and is expensive and difficult to handle. Chemistry 2019-02-14T00:00:00Z "Liquid helium, the coldest element on Earth, is invaluable for hospitals that use MRI scans to detect cancer, spinal cord injuries and liver diseases," wrote Becker's Hospital Review, a leading magazine about the hospital industry. A helium shortage might mean you can't get the medical scans you need. Here's why 2022-11-03T04:00:00Z The core then contains only helium, “contaminated” by whatever small percentage of heavier elements the star had to begin with. Astronomy 2016-10-13T00:00:00Z Members of the r/helium subreddit have been increasingly vocal about seeing poor Helium returns. Helium says its crypto mesh network is used by Lime and Salesforce — it isn’t 2022-07-29T04:00:00Z In a nuclear fusion reaction, 2 g of hydrogen is converted into 1.985 g of helium. College Physics for AP Courses 2015-08-12T00:00:00Z Alpha particles also represented by the symbol are high-energy helium nuclei. Chemistry 2019-02-14T00:00:00Z Not everyone is pessimistic about the helium crisis. A helium shortage might mean you can't get the medical scans you need. Here's why 2022-11-03T04:00:00Z The helium in the core can be thought of as the accumulated “ash” from the nuclear “burning” of hydrogen during the main-sequence stage. Astronomy 2016-10-13T00:00:00Z The Federal Helium Reserve held about 16 billion cubic feet of helium in 2010 and is being depleted by about 2.1 billion cubic feet each year. Algebra and Trigonometry 2015-02-13T00:00:00Z Collisions with target nuclei provide a wealth of information, such as information obtained by Rutherford using energetic helium nuclei from natural α radiation. College Physics for AP Courses 2015-08-12T00:00:00Z The principal source of energy in the sun is a net fusion reaction in which four hydrogen nuclei fuse and produce one helium nucleus and two positrons. Chemistry 2019-02-14T00:00:00Z "MRI technology has already adapted to the helium shortage in that scanners produced for the last ~5 years do not consume significant quantities of helium," he noted. A helium shortage might mean you can't get the medical scans you need. Here's why 2022-11-03T04:00:00Z Since the central temperature is not yet high enough to fuse helium, there is no nuclear energy source to supply heat to the central region of the star. Astronomy 2016-10-13T00:00:00Z Her voice is both sweet and expansive — helium and honey — as the Sudanese American poet speaks of Arabic study, of her identity in relationship to nation-state and family. 'Minding my people's business': An acclaimed Sudanese American poet makes a home in L.A. 2022-07-20T04:00:00Z Alpha decay is nuclear decay in which a helium nucleus is emitted. College Physics for AP Courses 2015-08-12T00:00:00Z Following hydrogen is the noble gas helium, which has an atomic number of 2. Chemistry 2019-02-14T00:00:00Z Those collisions produced hydrogen and helium, the most common elements in the universe, along with a small amount of lithium. Physical Geology 2015-01-01T00:00:00Z Meanwhile, the helium core continues to contract, producing more heat right around it. Astronomy 2016-10-13T00:00:00Z The early stars must have been different because the Big Bang created only hydrogen and helium with a smidgen of lithium and beryllium. How the Webb telescope sees into the origins of the universe 2022-07-12T04:00:00Z This energy is easily transferred by collision to neon atoms, because they have an excited state at nearly the same energy as that in helium. College Physics for AP Courses 2015-08-12T00:00:00Z The helium atom contains two protons and two electrons. Chemistry 2019-02-14T00:00:00Z We know that the big bang made hydrogen, helium, and lithium, but where did the rest of the elements come from? Physical Geology 2015-01-01T00:00:00Z Remember that red giants start out with a helium core where no energy generation is taking place, surrounded by a shell where hydrogen is undergoing fusion. Astronomy 2016-10-13T00:00:00Z This also happens to be the nucleus of a helium atom; helium gas may get trapped in the crystal lattice of a mineral in which alpha decay has taken place. An Introduction to Geology 2017-01-01T00:00:00Z A population inversion can be produced in neon, because there are so many more helium atoms and these put energy into the neon. College Physics for AP Courses 2015-08-12T00:00:00Z The electron configuration and orbital diagram of helium are: Chemistry 2019-02-14T00:00:00Z That changed in June of 2015 when it was announced that a distant galaxy called CR7 had been found that contained stars made only of hydrogen and helium. Physical Geology 2015-01-01T00:00:00Z We have runaway generation of energy, which reignites the entire helium core in a flash. Astronomy 2016-10-13T00:00:00Z Spectroscopy shows that the Sun is mostly made of hydrogen and helium. An Introduction to Geology 2017-01-01T00:00:00Z Excited helium atoms easily de-excite by transferring energy to neon in a collision. College Physics for AP Courses 2015-08-12T00:00:00Z A helium atom has two electrons, both of which are in its 1s orbital. Chemistry 2019-02-14T00:00:00Z The gas consists largely of hydrogen and helium, and the dust consists of tiny mineral grains, ice crystals, and organic particles. Physical Geology 2015-01-01T00:00:00Z You might wonder why the next major step in nuclear fusion in stars involves three helium nuclei and not just two. Astronomy 2016-10-13T00:00:00Z An element such as hydrogen combines or fuses with other hydrogen atoms in the core of a star to become a new element, in this case, helium. An Introduction to Geology 2017-01-01T00:00:00Z Figure 32.19 Nuclear fusion in the Sun converts hydrogen nuclei into helium; fusion occurs primarily at the boundary of the helium core, where temperature is highest and sufficient hydrogen remains. College Physics for AP Courses 2015-08-12T00:00:00Z What is the pressure in pascal of the helium gas produced if it occupies a volume of 125 mL at a temperature of 25 °C? Chemistry 2019-02-14T00:00:00Z This was very early in the universe’s history, when stars still consisted largely of hydrogen and helium. Physical Geology 2015-01-01T00:00:00Z These include, from the center outward, the carbon-oxygen core, a layer of helium hot enough to fuse, a layer of cooler helium, a layer of hydrogen hot enough to fuse, and then cooler hydrogen beyond. Astronomy 2016-10-13T00:00:00Z If a star is large enough, it has sufficient heat and pressure to start fusing helium into heavier elements. An Introduction to Geology 2017-01-01T00:00:00Z Another set of reactions that result in the fusing of hydrogen into helium in the Sun and especially in hotter stars is called the carbon cycle. College Physics for AP Courses 2015-08-12T00:00:00Z Only a few elements, such as the gases helium, neon, and argon, consist of a collection of individual atoms that move about independently of one another. Chemistry 2019-02-14T00:00:00Z Different elements absorb light of specific wavelengths, and many of the black lines in Figure 22.4 represent colours that are absorbed by hydrogen and helium within the Sun. Physical Geology 2015-01-01T00:00:00Z Recall that the last time the star was in this predicament, helium fusion came to its rescue. Astronomy 2016-10-13T00:00:00Z If the star has enough mass and reaches a point at which the primary fusion element, such as helium, is exhausted, fusion continues using new, heavier elements. An Introduction to Geology 2017-01-01T00:00:00Z Is your body buoyed by the atmosphere, or are only helium balloons affected? College Physics for AP Courses 2015-08-12T00:00:00Z Why did the model work so well describing hydrogen and one- electron ions, but could not correctly predict the emission spectrum for helium or any larger atoms? Chemistry 2019-02-14T00:00:00Z For example, when hydrogen atoms smash together and fuse, helium is formed. Physical Geology 2015-01-01T00:00:00Z As a result of changes caused by the buildup of helium in its core, the Sun will continue to increase in luminosity as it grows older, and more and more radiation will reach Earth. Astronomy 2016-10-13T00:00:00Z When the innermost shell is the valence shell, as in the case of hydrogen and helium, it obeys the octet rule when it is full with two electrons. An Introduction to Geology 2017-01-01T00:00:00Z Very few helium atoms are left in the atmosphere, but there were many when the atmosphere was formed. College Physics for AP Courses 2015-08-12T00:00:00Z The n = 1 shell is completely filled in a helium atom. Chemistry 2019-02-14T00:00:00Z It started out with a thin veil of hydrogen and helium gases that came with the material it accreted. Physical Geology 2015-01-01T00:00:00Z Yet when we look around us on Earth, we see lots of other elements besides hydrogen and helium. Astronomy 2016-10-13T00:00:00Z An example is the noble gas helium which has 2 valence electrons in the first shell. An Introduction to Geology 2017-01-01T00:00:00Z The reason for the loss of helium atoms is that there are a small number of helium atoms with speeds higher than Earth’s escape velocity even at normal temperatures. College Physics for AP Courses 2015-08-12T00:00:00Z The first two electrons in lithium fill the 1s orbital and have the same sets of four quantum numbers as the two electrons in helium. Chemistry 2019-02-14T00:00:00Z However, hydrogen and helium are very light gases, and they bled off into space. Physical Geology 2015-01-01T00:00:00Z One difference is that for stars with more than about twice the mass of the Sun, helium begins fusion more gradually, rather than with a sudden flash. Astronomy 2016-10-13T00:00:00Z Astronomers think the big bang created lighter elements, mostly hydrogen and smaller amounts of elements helium, lithium, and beryllium. An Introduction to Geology 2017-01-01T00:00:00Z The energy emitted in the plutonium decay is 8.40×10 – 13 J and is entirely converted to kinetic energy of the helium and uranium nuclei. College Physics for AP Courses 2015-08-12T00:00:00Z The net energy change would be zero, so there is no driving force for helium atoms to form the diatomic molecule. Chemistry 2019-02-14T00:00:00Z The big bang produced hydrogen, helium, and lithium, but heavier elements come from nuclear fusion reactions in stars. Physical Geology 2015-01-01T00:00:00Z Now the search is on for true first-generation stars, made only of hydrogen and helium. Astronomy 2016-10-13T00:00:00Z The ice giants Uranus and Neptune are composed of mostly methane ices and only about 20% hydrogen and helium gases. An Introduction to Geology 2017-01-01T00:00:00Z Hydrogen and helium have just one and two electrons, respectively. Anatomy and Physiology 2013-06-19T00:00:00Z In fact, helium exists as discrete atoms rather than as diatomic molecules. Chemistry 2019-02-14T00:00:00Z All other elements have neutrons as well as protons in their nucleus, such as helium, which is depicted in Figure 2.2. Physical Geology 2015-01-01T00:00:00Z Each succeeding generation of stars therefore contains a larger proportion of elements heavier than hydrogen and helium. Astronomy 2016-10-13T00:00:00Z Second, the stronger gravitational pull of these giant planets allowed them to collect large quantities of hydrogen and helium, which could not be collected by the weaker gravity of the smaller planets. An Introduction to Geology 2017-01-01T00:00:00Z A second shell is necessary to hold the electrons in all elements larger than hydrogen and helium. Anatomy and Physiology 2013-06-19T00:00:00Z The distribution of molecular speeds in a sample of helium is shown in Figure 9.34. Chemistry 2019-02-14T00:00:00Z For helium, it is 4: two protons and two neutrons. Physical Geology 2015-01-01T00:00:00Z But after this helium was exhausted, the star’s core had once more found itself without a source of pressure to balance gravity and so had begun to contract. Astronomy 2016-10-13T00:00:00Z The first stars were mostly made of hydrogen and helium, the lightest elements of the periodic table, as heavier elements did not yet exist. Why Do Astronomers Seek the Most Distant Galaxies? 2022-07-01T04:00:00Z Reactions involving stable elements like helium are not likely to happen at all. Anatomy and Physiology 2013-06-19T00:00:00Z The formation of this solution clearly involves an increase in matter dispersal, since the helium and argon atoms occupy a volume twice as large as that which each occupied before mixing. Chemistry 2019-02-14T00:00:00Z In other words, a helium atom’s electron cloud is about 100,000 times bigger than its nucleus. Physical Geology 2015-01-01T00:00:00Z Outside the core, the composition is mainly hydrogen and helium. Astronomy 2016-10-13T00:00:00Z The high-energy neutrons released in fusion reactions can split lithium into helium and tritium if the reactor wall is lined with the metal. Fusion power may run out of fuel before it even gets started 2022-06-22T04:00:00Z The elements are arranged in order of their atomic number, with hydrogen and helium at the top of the table, and the more massive elements below. Anatomy and Physiology 2013-06-19T00:00:00Z Thus, mixtures of oxygen and helium are important for divers working under high pressures. Chemistry 2019-02-14T00:00:00Z They all appear in the far-right column of the periodic table: helium, neon, argon, etc. Physical Geology 2015-01-01T00:00:00Z In the meantime, as the core was experiencing its last catastrophe, the outer shells of neon, oxygen, carbon, helium, and hydrogen in the star did not yet know about the collapse. Astronomy 2016-10-13T00:00:00Z For example, neutron bombardment can turn the nickel in many steel alloys into a form that gives off helium, causing the steel to swell perceptibly. Fusion power may run out of fuel before it even gets started 2022-06-22T04:00:00Z In the planetary model, helium’s two electrons are shown circling the nucleus in a fixed orbit depicted as a ring. Anatomy and Physiology 2013-06-19T00:00:00Z A helium nucleus has a mass that is 0.7% less than that of four hydrogen nuclei; this lost mass is converted into energy during the fusion. Chemistry 2019-02-14T00:00:00Z Nuclear fusion, on the other hand, replicates the process that takes place inside the sun, where gravitational forces fuse hydrogen atoms into helium. A Big Step Toward Fusion Energy Is Hailed by a Seattle Start-Up 2022-06-22T04:00:00Z Just before it exhausts all sources of energy, a massive star has an iron core surrounded by shells of silicon, sulfur, oxygen, neon, carbon, helium, and hydrogen. Astronomy 2016-10-13T00:00:00Z Pipes carrying water or pressurized helium through the hot blankets will pick up the heat and produce steam that drives electricity-producing turbines. Fusion power may run out of fuel before it even gets started 2022-06-22T04:00:00Z In this case, the team of physicists took helium-3 — a helium atom with two protons but only one neutron — and cooled it to within a ten-thousandth of a degree above absolute zero. Physicists Link Two Time Crystals in Seemingly Impossible Experiment 2022-06-15T04:00:00Z They form a helium nucleus and a neutron: Chemistry 2019-02-14T00:00:00Z During another test, engineers identified a helium valve that wasn’t working properly, either. NASA rolled out its new massive rocket to the launchpad for the second time 2022-06-06T04:00:00Z A star that is fusing hydrogen to form helium in its core. Astronomy 2016-10-13T00:00:00Z That the speeches in “Undelivered” were never orated does take some of the helium out of their balloons, but in Nussbaum’s able hands, this cruise through what-might-have-been offers a hell of a fun ride. Review | In undelivered speeches, history’s alternate paths 2022-06-03T04:00:00Z At that temperature, the helium-3 transformed into a Bose-Einstein condensate, where all the atoms share a common quantum state and work in concert with each other. Physicists Link Two Time Crystals in Seemingly Impossible Experiment 2022-06-15T04:00:00Z These commodities, after being refined, can produce two gases crucial for the health care system: nitrous oxide, popularly known as laughing gas, and helium. Why the war in Ukraine might make root canals more difficult 2022-06-05T04:00:00Z While back inside the massive building, the SLS team replaced the faulty helium valve, and tightened some loose bolts that may have caused the hydrogen leak. NASA rolled out its new massive rocket to the launchpad for the second time 2022-06-06T04:00:00Z Nearly all stars appear to be composed mostly of hydrogen and helium, but their abundances of the heavier elements differ. Astronomy 2016-10-13T00:00:00Z The Breakthrough Institute and others in Silicon Valley, meanwhile, are trying to nurture a new generation of reactors that are more versatile, efficient and safe, using sodium or helium as a coolant instead of water. Climate worries galvanize a new pro-nuclear movement in the U.S. 2022-05-24T04:00:00Z In that condensate, all the spins of the electrons in the helium-3 linked up and worked together, generating waves of magnetic energy, the magnons. Physicists Link Two Time Crystals in Seemingly Impossible Experiment 2022-06-15T04:00:00Z Hopp said the helium supply has been constrained for some time and that the war exacerbated the problem. Why the war in Ukraine might make root canals more difficult 2022-06-05T04:00:00Z The University of Nebraska is ending its tradition of fans releasing red balloons at football games, citing a global helium shortage amid rampant inflation. Helium shortage pops Nebraska football’s red balloons tradition 2022-05-25T04:00:00Z Population II stars formed when the abundance of elements heavier than hydrogen and helium was low. Astronomy 2016-10-13T00:00:00Z Athletic director Trev Alberts said on his radio show Monday night a global shortage of helium led to the decision to end the practice. Up, up and away: Huskers ending balloon release after 1st TD 2022-05-24T04:00:00Z Unlike Earth, the moon may contain large amounts of helium-3, an isotope potentially useful as an alternative to uranium for nuclear power plants because it’s not radioactive. China, U.S. are racing to make billions from mining the moon’s minerals 2022-05-21T04:00:00Z These decisions affect the helium supply, as converting natural gas into a liquid entails removing trace helium, so shipping by pipeline has the unintended consequence of reducing the amount of helium for industrial use. Why the war in Ukraine might make root canals more difficult 2022-06-05T04:00:00Z According to Mr. Alberts, administrators told the athletic department that the University of Nebraska Medical Center in Omaha needs the helium for medical purposes. Helium shortage pops Nebraska football’s red balloons tradition 2022-05-25T04:00:00Z Population I stars formed later, after mass lost by dying members of the first generations of stars had seeded the interstellar medium with elements heavier than hydrogen and helium. Astronomy 2016-10-13T00:00:00Z Russia is one of the top helium suppliers, and Alberts said U.S. sanctions in response to the war in Ukraine have caused a shortage. Up, up and away: Huskers ending balloon release after 1st TD 2022-05-24T04:00:00Z Another highly valuable resource in space is helium-3, a rare version of helium that scientists think could be used in nuclear fusion reactions without producing radioactive waste. Wealthy nations are carving up space and its riches – and leaving other countries behind 2022-05-21T04:00:00Z Other idiosyncratic factors also negatively affect supply: For instance, a Texas facility that produces helium keeps getting shut down for safety violations. Why the war in Ukraine might make root canals more difficult 2022-06-05T04:00:00Z Economists said Wednesday that the helium shortage has arisen from production bottlenecks in the U.S. and global supply chain problems that have delayed imports. Helium shortage pops Nebraska football’s red balloons tradition 2022-05-25T04:00:00Z Thus, only the three lightest elements—hydrogen, helium, and a small amount of lithium—were formed in appreciable abundances at the beginning. Astronomy 2016-10-13T00:00:00Z Alberts said university leaders want the helium that would have been used in the balloons to go to the University of Nebraska Medical Center for medical use. Up, up and away: Huskers ending balloon release after 1st TD 2022-05-24T04:00:00Z If powerful spacefaring countries develop the technology to use and mine helium-3 – and choose not to share the benefits with other nations – it could result in lasting inequities. Wealthy nations are carving up space and its riches – and leaving other countries behind 2022-05-21T04:00:00Z In the long run, he suggested, manufacturers may build machines that don't need helium. Why the war in Ukraine might make root canals more difficult 2022-06-05T04:00:00Z “The most immediate cause of the shortage is a shutdown of the Cliffside helium facility in Texas,” said Victor Claar, an economist who teaches at Florida Gulf Coast University. Helium shortage pops Nebraska football’s red balloons tradition 2022-05-25T04:00:00Z Another 4% is mainly in the form of hydrogen and helium in the space between stars and in intergalactic space. Astronomy 2016-10-13T00:00:00Z When it starts up in 2025, the facility, costing more than €17 billion, aims to fuse hydrogen nuclei to form helium, ultimately yielding 10 times more energy than is needed to produce the plasma. News at a glance: A COVID-19 drug nixed, a Chinese database investigated, and a new energy research leader confirmed 2022-05-18T04:00:00Z Not only do rocket launches have immense carbon footprints, even some stratospheric balloon flights have potentially significant implications: World View’s balloons are powered by thousands of cubic meters of helium, which is a limited resource. The future of space tourism is now — well, not quite 2022-05-10T04:00:00Z The sun derives its energy by fusing hydrogen into helium. Readers Respond to the December 2021 Issue 2022-04-27T04:00:00Z Sam Kain, a finance professor at Walsh College in Michigan, said prices have also risen in recent years because Pennsylvania-based Air Products has acquired a monopoly on the nation’s helium reserve. Helium shortage pops Nebraska football’s red balloons tradition 2022-05-25T04:00:00Z In the hot, early universe, energetic photons collided with hydrogen and helium, and kept them moving so rapidly that gravity was still not strong enough to cause the atoms to come together to form galaxies. Astronomy 2016-10-13T00:00:00Z About 130 metric tons of liquid helium—about the weight of a midsize blue whale—keep 36,000 metric tons of the collider under 4 kelvin. Large Hadron Collider Seeks New Particles after Major Upgrade 2022-04-27T04:00:00Z The report proposes a mission that would drop a probe towards Uranus to explore mysteries such as what drives the powerful winds blowing through its atmosphere, composed of hydrogen, helium and methane. Next Stop, Uranus? Icy Planet Tops Priority List for Next Big NASA Mission 2022-04-19T04:00:00Z Scientists believe the planet mainly consists of some combination of rock, ices, and hydrogen and helium, but that hasn’t really been confirmed. Sending a probe to Uranus labeled as top priority by space science community 2022-04-19T04:00:00Z Economists say the price and availability of products like helium balloons will not level off until Americans buy less of them. Helium shortage pops Nebraska football’s red balloons tradition 2022-05-25T04:00:00Z Determinations of the abundances of deuterium, helium, and lithium based on nearby stars and galaxies were used to put limits on how much ordinary matter is in the universe. Astronomy 2016-10-13T00:00:00Z Indeed, Neptune does not have a solid surface like Earth; rather, its atmosphere is made mostly of hydrogen, helium, and methane. Neptune is cooling down when it should be heating up — and scientists aren't sure why 2022-04-18T04:00:00Z The helium valve inside the upper stage cannot be replaced until the rocket is back in its hangar at Kennedy Space Center. Fuel leak thwarts NASA’s dress rehearsal for moon rocket 2022-04-14T04:00:00Z The National Weather Service has cut back on weather balloon launches at some of its sites because of shortages of hydrogen and helium used to lift them, potentially affecting forecasts and weather and climate research. Forecasters Face Loss of Data as Weather Balloon Flights Are Cut 2022-04-05T04:00:00Z The Big Bang produced only the lightest elements, like hydrogen and helium. Hubble Space Telescope Spots Earliest and Farthest Star Known 2022-03-30T04:00:00Z The most abundant elements in cosmic rays are the nuclei of hydrogen and helium, but electrons and positrons are also found. Astronomy 2016-10-13T00:00:00Z It has no immediate solid surface, but rather is a gas giant, largely comprised of hydrogen and helium. Hubble discovers a Jupiter-like planet forming in a very strange way 2022-04-04T04:00:00Z Gas giants are planets, like our solar system's largest ones Jupiter and Saturn, composed mostly of hydrogen and helium, with swirling gases surrounding a smaller solid core. Gigantic Jupiter-like alien planet observed still 'in the womb' 2022-04-04T04:00:00Z The helium market has been affected this year by problems at the main domestic source, in Amarillo, Texas, and by a fire in January at a major new plant in Russia. Forecasters Face Loss of Data as Weather Balloon Flights Are Cut 2022-04-05T04:00:00Z On the radio, songs such as “99 Luftballons,” by the German synth-pop band Nena, imagined a devastating war triggered by the innocent release of a few helium balloons into the air. Gen X TikTok is recycling the culture of the late Cold War, and what's old is new again 2022-03-31T04:00:00Z Each second in the Sun, approximately 600 million tons of hydrogen undergo fusion into helium, with about 4 million tons turning into energy in the process. Astronomy 2016-10-13T00:00:00Z |
| 随便看 |
英语例句辞典收录了117811条英语例句在线翻译词条，基本涵盖了全部常用单词及词组的例句翻译及用法，是英语学习的有利工具。