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    36 billion solar masses: Cosmic Horseshoe galaxy harbors what may be the most massive black hole ever detected

    August 9, 2025, Categories  Astronomy/Space

    'Most massive black hole ever discovered' is detected
    Another image of the Cosmic Horseshoe, but with the pair of images of a second background source highlighted. The faint central image forms close to the black hole, which is what made the new discovery possible. Credit: NASA/ESA/Tian Li(University of Portsmouth)

    Astronomers have discovered potentially the most massive black hole ever detected. The cosmic behemoth is close to the theoretical upper limit of what is possible in the universe and is 10,000 times heavier than the black hole at the center of our own Milky Way galaxy.

    It exists in one of the most massive galaxies ever observed—the Cosmic Horseshoe—which is so big it distorts spacetime and warps the passing light of a background galaxy into a giant horseshoe-shaped Einstein ring.

    Such is the enormousness of the ultram...

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