Luna 1

Luna 1 was one of Cybertron's two moons.

Transformers: Exodus
The Moon was populated by Mini-Cons. During the Golden Age of Cybertron, Moon Base One was built there. The base was occupied by Starscream's Seekers during the civil war, and Sentinel Prime was imprisoned there after a disagreement with Megatron after he was kidnapped and taken to Kaon.