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Submission + - Nearby heaviest Black Hole discovereed (harvard.edu)

CirReal writes: ""An eclipsing black hole / companion star. This is a huge star that is partnered with a huge black hole. Astronomers have located an exceptionally massive black hole in orbit around a huge companion star. The black hole is part of a binary system in M33, a nearby galaxy about 3 million light years from Earth. By combining data from NASA's Chandra X-ray Observatory and the Gemini telescope on Mauna Kea, Hawaii, the mass of the black hole, known as M33 X-7, was determined to be 15.7 times that of the Sun. Eventually, the companion will also go supernova and then we'll have a pair of black holes.""

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