11ac1064_ions___Astronomy___Black_Holes__Question
[Date Answered] March 19, 1998 [Questioner (age, location)] Giulio (Milan, Italy) [Answer] Current data indicates that there is a very dense 'point mass' at the center of our galaxy, containing mass up to 1 million times the mass of our sun. This indicates that there is probably a black hole located there. [Question] 
What makes people think that in the center of our galaxy thers'a black hole?
Quickie Questions - Astronomy - Black Holes