Clusters of Galaxies
Galaxies come in clusters. Our own Milky Way is part
of a cluster of about 25 galaxies called the Local Group.
Other members are the Andromeda Galaxy (M31), the
Triangulum Galaxy (M33), an elliptical galaxy (M32), the
Large and Small Magellanic Clouds, the Sagittarius Dwarf,
and the dwarf spheroidal galaxies that orbit Andromeda.