The really big collapsar at the center of the Milky Way galaxy
SUPER MASSIVE BLACK HOLE AT THE CENTRE OF OUR GALAXY (Science Show:
17/06/2006)
How do you prove that something is there when it can't be seen? Although for
decades the existence of a super massive black hole at the centre of our
galaxy was viewed with scepticism by many astronomers, a team at the
University of California, Los Angeles did the maths to prove it and have
taken spectacular pictures of the galactic centre.
http://www.abc.net.au/rn/scienceshow/stories/2006/1652905.htm#