Astronomers May Have Spotted a Supermassive Black Hole at the Edge of Its Galaxy

Supermassive black holes are almost always found at the centers of galaxies, which is where theory says they should be. A newly discovered one appears to sit more than 30,000 light-years from its host galaxy's heart. Astronomers found it only because it gave itself away while shredding a passing star, and the leading explanations are a galactic merger that flung it outward or a recoil from an earlier black hole collision.