January 14, 2011 - The Atlantic
At more than six trillion times the mass of the sun, nearby galaxy M87 is the most massive galaxy in the local universe. Using the Gemini North telescope, which sits on top of Mauna Kea in Hawaii, astronomer Karl Gebhardt and his team measured the speed of stars moving past the galactic center to estimate the mass of the black hole situated in the middle of M87.
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