Question

How does a black hole change over time?

Answer 1

Hint: A black hole is a part of the space where it is found that the gravity pulls everything, that not even the light which has such high speed can pass through it. This is observed because a very huge mass is squeezed to fit into a very small space. This is often seen or observed when a star dies out.

Complete answer:
An seemingly impossible fact about black holes is that as we get closer to the black holes the flow of time slows down when compared to any point at a faraway distance from the black hole. According to Einstein’s theory this can be observed in any massive body, including the earth.
This slowing of time is mainly due to the loss of gravity and massive bodies. Inside the black hole the time and space, which are the basic entity of our understanding, gets swapped such that the math of the black holes gets complex.
At the centre of the black hole it is predicted by Einstein's theory of gravity that the time comes to an abrupt end, which means it gets destroyed and the time which we use to understand space becomes invalid.

Note:
This interesting yet mysterious nature of space, called the black hole is believed to be formed when the universe was formed. And that there are two types of black holes, namely the small and stellar. Where the small black holes are as small as an atom and contain massive stuff, like that of mountains, while the other stellar contains 20 times the mass of the sun .