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Astronomers Just Found The Closest Pair of Supermassive Black Holes Ever Detected - ScienceAlert
Dec 01, 2021 40 secs
Just 89 million light-years away, in the galaxy NGC 7727, two supermassive black holes are destined to become one.

Moreover, the two supermassive black holes are closer to each other than any other supermassive black hole binary we've seen, separated by a distance of just 1,600 light-years.

There are multiple reasons why supermassive black hole binaries are of interest to astronomers.

NGC 7727 had been an object of interest for a binary supermassive black hole for some time.

NGC 7727 did not have the bright flow usually associated with two active supermassive black holes.

This suggests, the researchers said, that there could be many more supermassive black hole binaries out there than we can currently detect.

Although the two black holes are destined to merge, it's going to take some time; around 250 million years or so, the researchers said.

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