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Satellites observed for the first time the smaller black hole of a black hole pair at the centre of the galaxy OJ 287. The smaller black hole was revealed by a sudden burst of brightness when it "swallowed" a large slice of the accretion disk surrounding the larger one, turning it into a jet of gas.
Several international research groups have already confirmed the theory that there are two black holes at the centre of the distant galaxy OJ 287, first suggested by astronomers at the University o
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