Page property search

This page provides a browsing interface for finding all values of a property and a given page. Other available search interfaces include the property search, and the ask query builder.

List of results

• Any lingering doubts about the reality of … Any lingering doubts about the reality of black holes dissolved three years ago when the Laser Interferometer Gravitational-Wave Observatory, or LIGO, detected [https://www.nytimes.com/2016/02/12/science/ligo-gravitational-waves-black-holes-einstein.html?module=inline the collision of a pair of distant black holes, which sent a shiver] through the fabric of space-time.</br></br>Now the reality has a face. Peter Galison, a physicist, filmmaker and historian at Harvard, and a member of the Event Horizon team, noted that there is “a wonderful open-ended sense of being able to see something” instead of merely accumulating statistical evidence. [[Category:Belief]]tegory:Belief]]  +
• As matter swirls into a black hole, it acc … As matter swirls into a black hole, it accretes into a disk just outside the event horizon. The ring of light in the new image corresponds to the innermost orbit of photons, the quantum particles that make up light. By laying a ruler across that ring, astronomers could measure the size of the black hole and see that it met Einstein’s prescription.</br></br>The measurement also gave a firm estimate of the mass of the Virgo black hole: 6.5 billion solar masses. That is heavier than most previous determinations, and it suggests that the masses of other big black holes may need to be revised upward.</br></br>The observations also revealed that the accretion disk — the doughnut of doom — is on its side with regard to Earth, the hole facing us and spinning clockwise. The image is brighter where gas flows around the hole, toward us.</br></br>Dr. Doeleman described the black hole in the center of the Milky Way as “a fascinating, interesting object.” But it is much smaller than the Virgo black hole, so its portrait is harder to capture. That task lies ahead for the Event Horizon Telescope. [[Category:Belief]]:Belief]]  +
• Astronomers announced on Wednesday that at … Astronomers announced on Wednesday that at last they had captured an image of the unobservable: a black hole, a cosmic abyss so deep and dense that not even light can escape it.</br></br>For years, and for all the mounting scientific evidence, black holes have remained marooned in the imaginations of artists and the algorithms of splashy computer models of the kind used in Christopher Nolan's outer-space epic “Interstellar.” Now they are more real than ever.</br></br>'''“We have seen what we thought was unseeable,”''' said Shep Doeleman, an astronomer at the Harvard-Smithsonian Center for Astrophysics, and director of the effort to capture the image, during a Wednesday news conference in Washington, D.C.</br></br>The image, of a lopsided ring of light surrounding a dark circle deep in the heart of the galaxy known as Messier 87, some 55 million light-years away from Earth, resembled the Eye of Sauron, a reminder yet again of the implacable power of nature. It is a smoke ring framing a one-way portal to eternity.</br></br>To capture the image, astronomers reached across intergalactic space to Messier 87, a giant galaxy in the constellation Virgo. There, a black hole several billion times more massive than the sun is unleashing a violent jet of energy some 5,000 light-years into space.</br></br>[https://www.nytimes.com/interactive/2019/science/astronomy-space-calendar.html Sign up to get reminders for space and astronomy events on your calendar ]</br></br>The image offered a final, ringing affirmation of an idea so disturbing that even Einstein, from whose equations black holes emerged, was loath to accept it. If too much matter is crammed into one place, the cumulative force of gravity becomes overwhelming, and the place becomes an eternal trap. Here, according to Einstein’s theory, matter, space and time come to an end and vanish like a dream.</br></br>On Wednesday morning that dark vision became a visceral reality. As far as the team of astronomers could ascertain, the shape of the shadow is circular, as Einstein’s theory predicts.</br></br>The results were announced simultaneously at news conferences in Washington, D.C., and five other places around the world, befitting an international collaboration involving 200 members, nine telescopes and [https://iopscience.iop.org/article/10.3847/2041-8213/ab0ec7/meta six papers] for the Astrophysical Journal Letters. When the image was put up on the screen in Washington, cheers and gasps, followed by applause, broke out in the room and throughout a universe of astrofans following the live-streamed event.</br></br>"Einstein must be totally chuffed,” said Priyamvada Natarajan, an astrophysicist at Yale. “His theory has just been stress-tested under conditions of extreme gravity, and looks to have held up.”</br></br>Kip Thorne, an astrophysicist at the California Institute of Technology, and who shared a Nobel Prize in 2017 for the discovery of gravitational waves from colliding black holes, wrote in an email: “It is wonderful to see the nearly circular shadow of the black hole. There can be no doubt this really is a black hole at the center of M87, with no signs of deviations from general relativity.”</br></br>Janna Levin, a cosmologist and professor at Barnard College in New York, said, “What a time to be alive.” [[Category:Belief]]  
• The unveiling today took place almost exac … The unveiling today took place almost exactly a century after images of [https://www.nytimes.com/2017/07/31/science/eclipse-einstein-general-relativity.html?module=inline stars askew in the heavens] made Einstein famous and confirmed his theory of general relativity as the law of the cosmos. That theory ''ascribes gravity to the warping of space and time by matter and energy'', much as a mattress sags under a sleeper.</br></br>General relativity led to a new conception of the cosmos, in which ''space-time could quiver, bend, rip, expand, swirl'' like a mix-master and even disappear forever into the maw of a black hole.</br></br>To Einstein’s surprise, the equations indicated that when too much matter or energy was concentrated in one place, ''space-time could collapse'', trapping matter and light in perpetuity. He disliked that idea, but the consensus today is that the universe is speckled with black holes furiously consuming everything around them.</br></br>[https://www.nytimes.com/interactive/2019/04/10/science/event-horizon-black-hole-images.html Interactive Image] [[Category:Belief]]Category:Belief]]  +