Closing In on the Milky Way's Central Black Hole

A pair of new long-term studies tracking the orbits of stars at the center of the Milky Way Galaxy further refine the evidence that a supermassive black hole lurks there. The two teams of researchers used data going back to 1992 and were even able to track a full revolution of one star, known as S2, around the theorized black hole, known as Sagittarius A*, some four million times the mass of the sun. [More]

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