- Globular Clusters (4)
- Open Clusters (2)
- Star Clusters Click the icon to view Star Clusters of the Messier Catalog Links Globular Globular clusters are gravitationally bound concentrations of approximately ten thousand to one million stars. They populate the halo or bulge of the Milky Way and other galaxies with a significant concentration toward the Galactic Center. Spectroscopic study of globular clusters shows that they are ...seds.org/messier/cluster.html