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Rogue black hole: First truly isolated stellar-mass black hole found

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Rogue black holes are usually detected by the matter falling into them, but the first truly isolated black hole has been found because of the way it bends the light of a distant star



Space



3 February 2022

Black hole, awesome science fiction wallpaper, cosmic landscape. Elements of this image furnished by NASA; Shutterstock ID 1044301654; purchase_order: -; job: -; client: -; other: -

Artist’s illustration of a rogue black hole

Shutterstock/Vadim Sadovski

An isolated stellar-mass black hole has been detected floating through interstellar space for the first time.

Astronomers typically spot black holes by measuring their interactions with nearby stars, which can produce vast plumes of gas or radiation. But isolated stars, which astronomers have observed in their millions, imply that isolated black holes should also fill the sky, as dying stars can birth black holes once they explode in a supernova.

“[Isolated stellar-mass black holes] aren’t rare, but they’ve never been found,” says …

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