Deep space
Spider Globular Cluster
Globular cluster · M4 · NGC 6121
Globular cluster in Scorpius
Photo: ESO Imaging Survey · CC BY 4.0 · Wikimedia Commons
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.
Description from Wikipedia (CC BY-SA 4.0).
In your sky
Share your location to see where this is in your sky right now.
Key facts
Distance
~7,200 light-years
Apparent mag.
+5.6
Apparent size
26′
Best seen with
Naked eye (dark sky)
Catalogue
M4 · NGC 6121
Did you know
- Listed as Messier 4 in the Messier catalogue, also known as NGC 6121.
- Found in the constellation Scorpius.
- Visible to the naked eye from a dark, moonless site.
