This material forms an accretion disk, which compresses and heats up until it emits detectable x-rays. For example, when a black hole results from the collapse of one star in a binary star system, it attracts material from the remaining star. A stellar-mass black hole, with a mass of tens of times the mass of the Sun, can likely form in seconds, after the collapse of a massive star. Because astronomers cannot directly observe a black hole, they infer its existence from the effects of its gravitational pull. Some theorists postulate that the material in a black hole may be compressed to a single point of infinite density called a singularity. Black holes are extremely dense: for the Sun, which has a diameter of about 1,390,000 kilometers (862,000 miles), to be as dense as a black hole, its entire mass would have to be squeezed down to a ball fewer than 3 kilometers (5 miles) across. The event horizon isn’t a surface like Earth’s or even the Sun’s.
These relatively small black holes can also be made through the merger of two dense stellar remnants called neutron stars. A black hole is so dense that gravity just beneath its surface, the event horizon, is strong enough that nothing not even light can escape. Black Hole Sun references Heaven sent hell away. A stellar-mass black hole, with a mass of tens of times the mass of the Sun, can likely form in seconds, after the collapse of a massive star. Even light cannot escape, since the escape velocity (the velocity needed for an object to escape some larger object's gravitational field) necessary to escape a black hole is greater than the speed of light. The colleague could be a person that was related to the song Say Hello 2 Heaven. A black hole is so dense that its gravitational forces are strong enough to prevent anything that comes close enough to the region known as the event horizon from escaping. If there is enough mass in this collapsed star, it becomes a black hole. The existence of black holes was first predicted by the general theory. A Closer Look When a very massive star ends its life in a supernova explosion, the remaining matter collapses in upon itself. If it had around 20 times the Sun’s mass or more, the star’s core collapses into a stellar-mass black hole. Black holes were given their name because they absorb all the light that falls on them.
0 kommentar(er)
