The Four
From GURPSworld Wiki
The Four is an isolated group of giant spiral galaxies in the Local Void. The galaxies are home to numerous planets with human populations at various stages of technological development. The Guardians monitor the various worlds of The Four, and are believed to occasionally take humans from those worlds for reasons related to their activities in the worlds of The Center. The galaxies that make up the four are:
The Uando Galaxy is the largest of the four, though they are all of comparable size. They are a gravitationally-bound galactic group that lies approximately 50 million lightyears from The Center.