“There are only about five dozen known black holes in the entire galaxy—120,000 light years wide—and there are supposed to be 10,000 to 20,000 of these things in a region just six light years wide that no one has been able to find,” said Columbia University astrophysicist Chuck Hailey, co-director of the Columbia … Continue reading Thousands of Black Holes Surround Mlky Way’s Supermassive Sagittarius A*