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    Fastest spinning black hole in the cosmos discovered

    Mar 18, 2021 2 minutes
    Words by Tim Childers
    © Getty

    Six decades after its discovery, the first black hole ever detected is still causing astronomers to scratch their heads. It turns out that the cosmic behemoth at the heart of the Cygnus X-1 system is 50 per cent more massive than previously thought, making it the heaviest stellar-mass black hole ever observed directly.

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