Reinhard Genzel talking about his research (http://is.gd/f4za) into the center of our Galaxy and the apparent supermassive black hole there, in a colloquium on 9 January 2009 at the Physics Institute of Bonn University.

Reinhard Genzel talking about his research (http://is.gd/f4za) into the center of our Galaxy and the apparent supermassive black hole there, in a colloquium on 9 January 2009 at the Physics Institute of Bonn University.