Ordinary matter to start with, but compressed so much the laws of physics break down. We don't know anything about what happens to atoms in a black hole, since no information or even light can emerge from one. The gravity of a black hole is so strong past a certain radius that nothing at all can escape. This is called the Event Horizon. Hawking however has theorised that quantum radiation can escape from a black hole.
172 views
Usually answered in minutes!
×