"Cluster" redirects here. For galaxy clusters, see Galaxy cluster.
Star clusters are massive groups of stars inside galaxies. There are two classes of star clusters: globular clusters are very large, dense clusters containing between a few hundred and a million stars and measuring a few hundred light years across, and open clusters, are smaller groups, usually containing a few score stars, and measuring no more than a hundred light-years across. Open clusters also have a subtype known as moving groups which are clusters which move through the galaxy along with their constituent stars.
Star cluster is part of a series on verses.
|Universe • Hypercluster/Void • Supercluster • Galaxy cluster • Galaxy/Dwarf galaxy • Cluster • Star • Planet • Moon • Asteroid • Continent • Country • State • City • Entity • Compound • Atom • Subatomic particle • Quark • Preon • String|