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The first dormant black hole likely found lurking in another galaxy
The first dormant black hole likely found lurking in another galaxy,Despite years of searching for stellar-mass black holes — ones up to a few dozen times the mass of the Sun that form when massive stars explodes — not that many have been found. And in all those cases they betray their presence by eating matter from a companion star, causing them to glow brightly in X-rays.

The first dormant black hole likely found lurking in another galaxy

Despite years of searching for stellar-mass black holes — ones up to a few dozen times the mass of the Sun that form when massive stars explodes — not that many have been found. And in all those cases they betray their presence by eating matter from a companion star, causing them to glow brightly in X-rays.