Is The Black hole The Most Powerful Force In The Universe? - Space Science Documentary
Video By: How the Universe Works
> Black holes are some of the strangest and most fascinating objects in outer space. They're extremely dense, with such strong gravitational attraction that even light cannot escape their grasp if it comes near enough.
So far, astronomers have identified three types of black holes:
* stellar black holes,
* supermassive black holes, and
* intermediate black holes
By: How the Universe Works