Sirus

Sirus was the home planet of the Eleventh Doctor's Brancheerian companion, Decky Flamboon. It had at least three moons. Only by gathering up the co-ordinates hidden on replicas of Earth landmarks sold by the fellow Brancheerian Monty Punnions and scattered across the universe was the Doctor able to crack the dimensional protection around the planet. But that was the point. Monty had led a trail for alien ant invaders to invade and mine the planet's resources. The native Brancheerians had fled to the nearby moons of Flamboon where the Flamboon clans lived. They returned after the invasion was defeated. (The Tail of Decky Flamboon)