Question

what is black holes?

Answer 1

black holes are the regions of strong gravitational field from which not even light can escape. Black holes form when a star is at the end of life, that is at a supernova stage. The star explodes and The outer parts of the star are expelled in the space while the core of the star collapses under its own weight and forms black hole

Answer 2

Black hole is huge mass concentrated in small volume..so that is density is very high..it is a region of very strong gravitational fields. ..even light cannot escape from it...and inside black hole time stops..