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An Artist's conception of Cygnus X-1

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  • Cygnus X-1

    Cygnus X-1 was the first discovered black hole. Trivia There is a popular song by the band Rush...

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current19:31, March 23, 2010Thumbnail for version as of 19:31, March 23, 2010450 × 383 (28 KB)Sk8rbluscat (Talk | contribs)An Artist's conception of Cygnus X-1