What is a Black Hole?

A Black Hole ia an area in space where the force of gravity is so strong that even light cannot escape from it. Black Holes are created when a burned-out star collapses. Eventually it shrinks into a tiny sphere of material. The gravity of this material is so powerful that it pulls in everything around it. It is said that nothing that goes into a Black Hole ever comes out. We cannot see Black Holes. We can sometimes recognize them from the radio waves given off as a star is drawn into it.