X-ray Sources
Earth-orbiting satellites Uhuru and Chandra X-ray Observatory have detected two bright X-ray sources in this cluster: Messier 15 X-1 (4U 2129+12) and Messier 15 X-2. The former appears to be the first astronomical X-ray source detected in Pegasus.
Read more about this topic: Messier 15
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“The sources of poetry are in the spirit seeking completeness.”
—Muriel Rukeyser (1913–1980)