11ac1064_ions___Astronomy___Black_Holes__Question
[Date Answered] May 30, 2007 [Questioner (age, location)] Aheli ( India) [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. More detailed information at our web page Black Holes. [Question] 
What is a black holl? Do they really exists? please try to explaim me in full details.
Quickie Questions - Astronomy - Black Holes