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出典:Wikipedia
出典:『Wikipedia』 (2011/07/10 05:25 UTC 版)
The first X-ray source in Andromeda is an astronomical X-ray source probably detected between June 12, 1962, Scorpius X-1, and January 9, 1979, Sagitta X-1 (Sge X-1), though it may not have received the X-1 designation.
First X-ray source in Andromeda