Black holes are celestial objects that have very little known about them. Even then a lot about what we do know about them is just speculation.
There are two main parts of a black hole:
The singularity is the center of the black hole. It is the place that everything trapped by a black holes enormous gravity goes. A singularity is a place that scientists cannot figure out because to solve them you need to divide by 0 which currently is impossible.
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