Globular Cluster M4 - Definition

Globular Cluster M4 (also known as Messier Object 4, Messier 4, M4, or NGC 6121) is a globular cluster in the Scorpius constellation. It was discovered by Philippe Loys de Chéseaux in 1746.

External links

• M4, SEDS Messier pages (http://www.seds.org/messier/m/m004.html)

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