The Apollo System was a heavily developed star system held by The Royal Allegiance.
The system was quite possibly the most heavily developed and populated star system in Allegiance space, rivalling the Theran System, and as a result the known galaxy. Thousands of ships, habitat stations, research platforms, defense stations, civilian installations and other space-borne constructions made it one of the most busy and bustling places in the Allegiance. Its primary population centre was the planet of Avalon which was the second closest planet to the star of a total eight planets. The third planet from the star, Astrea, was also populated quite densely. Forerunner constructions and facilities littered the system, though not to the degree found in the nearby Theran System.