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SlideshowReport

An “Intermediate-Mass” Black Hole

Description
An “Intermediate-Mass” Black Hole
M82 is an unusual galaxy in the constellation Ursa Major. The inset shows an
image of the central region of M82 from the Chandra X-ray Observatory. The
bright, compact X-ray source shown varies in its light output over a period of
months. The properties of this source suggest that it is a black hole of
roughly 500 solar masses
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