|A general term for a group of related stars. There are two basic types of star cluster:
Open and Globular. Open Clusters represent stellar 'siblings': stars
born in the same stellar nursery that develop together. Globular Clusters tend to be
larger, and are normally found in intergalactic space, outside the disc of the Milky Way.
In young Open Clusters like this one, it is common to find remnants of the nebular material from which the cluster's stars were born.
A typical Globular Cluster. About 250 of these huge spherical clusters swarm around the
Milky Way galaxy.