Messier 4 or M4 is a globular cluster in the constellation of Scorpius. It was discovered by Philippe Loys de Chéseaux in 1745 and catalogued by Charles Messier in 1764. It was the first globular cluster in which individual stars were resolved.

Distance to Earth: 7,175 light years

Radius: 34.997 light years

Constellation: Scorpius

Metallicity: = –1.07 dex

Apparent dimensions (V): 26′.0

Did you know: Messier 4 is one of the nearest globular clusters to Earth, along with NGC 6397, a cluster located in the constellation Ara, the Altar.