Astronomers Size Up a Candidate for Midsize Black Hole

Wednesday, July 1, 2009 - 12:56 in Astronomy & Space

Black holes vary greatly in size, from relatively small ones several times the mass of the sun, which are born of collapsed stars, to supermassive lurkers like the one at the center of our Milky Way Galaxy, with the mass of about four million suns. [More]

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