6 months ago
Last edited at 10:34AM on 6/22/2013
A black hole is a singularity, which is the SMALLEST possible point in space... smaller than an atom. The reason why a black hole sucks everything in is because of its gravity. When a supergiant star goes supernova, gravity collapses the dead core of the star into a black hole. The black hole still retains the mass of the star, but that mass is concentrated into that infinitely small space, the singularity. That means its density is infinite, and thus its gravity is off the charts.
The black hole also twists and distorts the spacetime fabric around it, which is why time virtually comes to a halt near a black hole. Also, due to its gravity, light cannot escape it... and light is the fastest thing in the universe. Black holes basically break the laws of physics.
A collapsed star that gives off immense gravitational force, over a million times of a sun. It's gravity is so strong that even light can't escape it. It's the ending stellar stage of a super massive star.