Black holes are some of the very mysterious and interesting items in outer distance. Possessing a superior density, and also the atmospheric pressure so effective that even light can't escape outside it.
They started speaking about albert Einstein 1916 if he first generated the overall idea of relativity. The word started from 1967 from John Wheeler. Along with the very first black hole "recognized" in 1971.
You can find 3 different types: leading black holes, supermassive along with also intermediate.