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    Coma Cluster tagged posts

    The Sleeping Giant NGC 4889 harbors a Dark Secret

    February 12, 2016, Categories  Health/Medical

    This image shows the elliptical galaxy NGC 4889 in front of hundreds of background galaxies, and deeply embedded within the Coma galaxy cluster. Well-hidden from human eyes, there is a gigantic supermassive black hole at the center of the galaxy. Credit: NASA & ESA

    This image shows the elliptical galaxy NGC 4889 in front of hundreds of background galaxies, and deeply embedded within the Coma galaxy cluster. Well-hidden from human eyes, there is a gigantic supermassive black hole at the center of the galaxy. Credit: NASA & ESA

    The placid appearance of NGC 4889 can fool the unsuspecting observer. But the elliptical galaxy harbours one of the most supermassive black holes ever discovered. Located ~300 million light-years away in the Coma Cluster, the giant elliptical galaxy NGC 4889, the brightest and largest galaxy in this image has a black hole that is 21 billion times the mass of the Sun. The event horizon has a diameter of ~130 billion kilometres. This is about 15X the diameter of Neptune’s orbit from the Sun...

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