The ones on the moon belong to the Anunnaki. They gave me the tour the last time I was abducted.
Lucky you ... I only got the fly-over tour. Of course, it was in the Culture General System Vehicle Little Rascal (Plate Class). Things on board were getting more lively now that ship construction was transfered, so the population is quickly rising above 250,000,000 - new home construction is going gangbusters.
Got to see a new Abominator Class Rapid Offensive Unit - man talk about fire power! The thing can take out entire solar systems without breaking a sweat.