“There has never been direct evidence of a black hole,” said physicist George Chapline, while acknowledging there are objects that general relativity would predict are black holes at the centers of galaxies. “Ironically, Einstein also didn’t believe in black holes even though he created general relativity.”
At the center of our Milky Way Galaxy lies a monster black hole, Sagittarius A*, that contains about 4 million times more material than our sun. Yet it’s a sleeping giant. Compared to the giant black holes in the centers of other galaxies, our black hole is strangely quiet.
