11ac1064_ions___Astronomy___Black_Holes__Question
[Date Answered] October 19, 2009 [Questioner (age, location)] Alec (Arizona) [Answer] Black Holes are theoretical objects. A black hole is an object which has such high gravitational pull that not even light can escape. Hence it is black. Which makes it pretty hard to observe directly. Black Holes may form as the result of the collapse of a very massive star at its death. Just as neutron stars form during a supernova explosion of a very massive star so do black holes. But in the black hole case the initial star was so massive that nothing could stop its gravitational collapse. All the matter of the star's core is crushed to an infinitely small point, a singularity. More information can be found at our web page Black Holes. [Question] 
How do black holes work?
Quickie Questions - Astronomy - Black Holes