Andromeda (Galaxy)

The Andromeda Galaxy, also known as Galatron Spiral and Messier 31, is the closest large galaxy to the Milky Way, and the original home of the Prometheans.

Description
The Andromeda Galaxy is a spiral galaxy 2.5 million light years away from the Milky Way, holding over one trillion stars and measuring about 220,000 light years in diameter, orbited by at least 20 satellite galaxies. It has a bar-like structure of stars in its center, like the Milky Way.