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  • lewis_whokeyser lewis_whokeyser Nov 28, 2012 8:15 PM Flag

    OT: Small Galaxy Packs BIG Black Hole

    From Discovery News
    Astronomers have found a super-super-massive black hole comprising a whopping and unprecedented 59 percent of the mass of stars in the central bulge of its host galaxy, a discovery that adds a new twist to the mysterious relationship between a galaxy and its black hole.

    The black hole inside the small, compact galaxy known as NGC 1277, located about 250 million light years away in the constellation Perseus, weighs in at 17 billion times the mass of the sun.

    In comparison, the supermassive black hole at the heart of our Milky Way galaxy is equal to the mass of about 4 million suns.

    Typically, black holes account for 0.1 percent of a galaxy's stellar bulge. Until now, the galaxy with the proportionally largest black hole was NCG 4486B, which has a black hole accounting for 11 percent of the combined mass of the central stars.

    How 1277's black hole came to be so large is mystery.