Clavius 5

A very small, cold terrestrial planet on the outskirts of Yellow Diamond's range of conquest, it's colonization has recently been considered completed. Clavius 5 is a mining outpost where materials for technology and architecture are acquired. However, there are few large kindergartens on the surface. The planet is situated near an asteroid belt that takes up most of the Clavius star system, where it is rumored that there is a hidden intergalactic exchange; this would of course be illegal, and Homeworld officials vehemently deny its existence.