Black Holes Black holes

INTRODUCTION A black hole is a place in space where gravity pulls so much that even light can not get out . The gravity is so strong because matter has been squeezed into a tiny space . This can happen when a star is dying . Because no light can get out , people can’t see black holes . They are invisible . Space telescopes with special tools can help find black holes .

How Black Holes form Scientists think the smallest black holes formed when the universe began. Stellar black holes are made when the center of a very big star falls in upon itself, or collapses. When this happens, it causes a supernova. A supernova is an exploding star that blasts part of the star into space. Scientists think supermassive black holes were made at the same time as the galaxy they are in

How Black Holes form Scientists think the smallest black holes formed when the universe began. Stellar black holes are made when the center of a very big star falls in upon itself, or collapses. When this happens, it causes a supernova. A supernova is an exploding star that blasts part of the star into space. Scientists think supermassive black holes were made at the same time as the galaxy they are in. Gas that falls into black hole settles into a so-called accretion disk. Friction and magnetic fields in the disk cause the gas to heat and emit X-rays.

News December 3,2015 The long list of unanswered questions about black holes contains one particularly surprising item: How do they eat? Unlike many of the riddles that black holes pose, this one seems so simple: What do you mean we don’t know how things fall into a black hole?The question makes sense when you stop thinking about black holes as cosmic vacuum cleaners—which they are not—and start seeing them as astrophysical objects that (in many cases) play by the same orbital rules as stars and planets. The earth doesn’t fall into the sun. Likewise, all things being equal, an object orbiting a black hole at a safe distance should keep sailing peacefully and indefinitely along its path. And yet we know stuff falls into black holes all the time because as it does, its gravitational energy is converted to electromagnetic radiation—light—and the black hole shines.