These Chunky Monsters Are The Heaviest Pair Of Black Holes Ever Found

Black holes are typically thought of as lonely beasts, sucking up anything which comes too close to them — whether that is dust, planets, or even stars. But black holes can surprisingly often be found in pairs, with the two orbiting each other and often feeding off each other or even eventually plummeting into each other and colliding in a merger. How two black holes get close enough to each other to become a binary is a big question.

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