An artificial planet built by the Quintessons as a manufacturing base for their line of transforming robots, made up of metal and about the size of Mars. It's density is only about that of Earth, due to the massive honeycomb structure of the planet beneath the surface. These robots they created eventually became self-aware, and ousted the Quintessons. This race, collectively known as the Transformers, split into two warring factions - the Autobots and the Decepticons.