Black Holes What do they really do?

Image an object so dense; its gravity so strong, that escape velocity is more then 299,792,458 meters per second. That is the speed of light. If Einstein was right and nothing can travel faster than the speed of light, then nothing could reach escape velocity here.

 A black hole is the end product in the lifecycle of a giant star. Anything that crosses a black hole's event horizon is crushed into an incredibly dense singularity. With the addition of each bit of matter consumed by a black hole, its event horizon continues to expand. The only limit to this expansion is the amount of available matter. It is theoretically possible to devour millions or billions of stars. In fact, some scientists theorize that rotating black holes (also know as Kerr black holes) which contain billions of dead stars lie at the centers of galaxies.

 A black hole is a region where matter collapses to infinite density, and where, as a result, the curvature of space-time is extreme. Moreover, the intense gravitational field of the black hole prevents any light or other electromagnetic radiation from escaping. But where lays the "point of no return" at which any matter or energy is doomed to disappear from the visible universe?

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