Question

What is inside of black hole

Answer 1

A black hole has a boundary, called the event horizon. It is where gravity is just strong enough to drag lightback, and prevent it escaping. Because nothing can travel faster than light, everything else will get dragged back also. Falling through the event horizon, is a bit like going over Niagra Falls in a canoe.

Answer 2

full of gravity of mass . if u fall inside of black hole every thing will stop like statue are u under stande