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Messier 15 is a globular cluster with an enormous star density in its core, that might result from a black hole. The cluster’s distance is roughly 30600lyrs.
The object was discovered by Jean-Dominique Maraldi in 1746 and a few years later added to Messier’s catalogue. The planetary nebula Pease 1 - the first
planetary ever discovered within a globular star cluster - can not be seen in this image.