What lies inside a black hole is barely known. What you would see inside a black hole, if you were to survive that long, would be nothing. Absolutely nothing.

Inside a black hole, it is also black, same as the outside. Some people would believe that you would be able to see into the future and past if you were to look from the right angle, but this is not the case. As soon as you were to enter the hole, the vacuum would suck the oxygen straight out of your windpipe and lungs and you would die almost instantaneously on entry.

To put it simply, Entering a black hole = sudden death.

If you would like my advice, if you're an astronaut, don't go in a black hole unless you want to die and have your body lost forever.