A black hole is a concept of astrophysics. “It is an extremely compact celestial element so that the strength of its gravitational field prevents any form of matter or radiation from escaping from it”.
THEy are hidden in space and swallow up anything that gets too close. But what’s inside ?
“A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying”. (Sources : NASA)
Black holes can have different sizes, the largest ones are called “supermassive” with masses of millions of suns.
At the center of a black hole, there is a region in which the gravitational field and certain spacetime distortions diverge ad infinitum, regardless of the change in coordinates. (we approach the concept of curvature of space-time) This region of the black hole is called a gravitational singularity.
The question is valid ? What if we got into a black hole?
We would probably be reduced to a bunch of disparate atoms or sent to another universe. Either way, no one on this planet has ever entered it.