1/18/2024 0 Comments Information about blackhole![]() In the far future of the universe, long after all stars have died and galaxies have been wrenched from view by the accelerating cosmic expansion, black holes will be the last surviving objects. Nothing can escape from inside the event horizon, so you could not escape or report on your experience.Īccording to Stephen Hawking, black holes are slowly evaporating. The bad news is that the event horizon marks the edge of the abyss. Although their gravity is stronger, the stretching force is weaker than it would be with a small black hole and it would not kill you. The good news about massive black holes is that you could survive falling into one. Time freezes at the event horizon and gravity becomes infinite at the singularity. At their centers is a singularity, a point in space where the density is infinite. We can’t understand the interior of a black hole because the laws of physics break down. Like all black holes, the huge ones are shielded from view by an event horizon. Its outer edge moves at half the speed of light. Whereas the outer planets in our solar system orbit once in 250 years, this much more massive object spins once every three months. The biggest black hole discovered so far weighs in at 40 billion times the mass of the Sun, or 20 times the size of the solar system. 11 fascinating facts about our Milky Way galaxy From Big Bang to present: Snapshots of our universe through time The 18 biggest unsolved mysteries in physics Quasars are the brightest objects in the universe. In this analogy, the black hole in its active state is like a light source 1 inch in diameter in downtown LA that outshines the city by a factor of hundreds or thousands. The roughly 100 million lights from cars, houses and streets in the city correspond to the stars in a galaxy. How bright is a quasar? Imagine hovering over a large city like Los Angeles at night. And if they are in their active quasar phase, you’ll be blasted by high-energy radiation. ![]() If you get too close, the enormous gravity will suck you in. Massive black holes are dangerous in two ways. These black holes are dark most of the time, but when their gravity pulls in nearby stars and gas, they flare into intense activity and pump out a huge amount of radiation. ![]() It’s over a thousand times bigger than the black hole in our galaxy, whose discoverers snagged this year's Nobel Prize. Just last year, astronomers published the first-ever picture of a black hole and its event horizon, a 7-billion-solar-mass beast at the center of the M87 elliptical galaxy. The fate of anyone falling into a black hole would be a painful "spaghettification," an idea popularized by Stephen Hawking in his book "A Brief History of Time." That’s like the difference between an apple and the Great Pyramid of Giza. Nature knows how to make black holes over a staggering range of masses, from star corpses a few times the mass of the Sun to monsters tens of billions of times more massive. Over the past 30 years, observations with the Hubble Space Telescope have shown that all galaxies have black holes at their centers. ![]()
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