Astronomers Have Found Evidence of a Big Black Hole Wandering Our Galaxy

sciencealert.com - 01-16

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The peculiar movement of gas at the galactic centre could be the smoking gun that finally leads astronomers to the most elusive type of black hole - the middleweight. Black holes are pretty hard to find unless they're actively feeding (or colliding), since they don't emit any electromagnetic radiation (except perhaps for Hawking radiation, which, if it exists, we can't detect).