Satellite galaxy

Satellite galaxies, also called dwarf galaxies, were small galaxies that orbited larger galaxies. They contained many stars, but not as many as a larger galaxy.

Mutter's Spiral had a satellite galaxy called the Sculptor Dwarf galaxy or Galaxy Seven. (NSA: The Eyeless) It also had the two Magellanic Clouds, called the Larger Magellanic Cloud and Smaller Magellanic Cloud. (AG: The Last Voyage)

In the 43rd century, humans colonised the Canis Major Dwarf galaxy. (DWBIT: )