Lenticula

Despite Lenticula's small size, it has very active movement in its ice.  The three settlements on it could more actively be said to float above it, using technology originated by the Arcane Artifice's Mystic Metropolis.  Massive chains kept magically hot anchor the settlements' 'plates' to the rocky crust beneath the surface ice sheets.  Being on plates ensures the settlements do not run the risk of being broken up or damaged by newly developed canyons or mountains, and the chains being kept hot by magic keeps the ice from destroying them.  (The chains and plates require very frequent maintenance, but the administrators of the settlements are very diligent about that, as carelessness with maintenance could cost the lives of everyone in a settlement).

Most work in the settlements tend to be scientific research and development of varying sorts, though there are plenty of more mundane jobs.  Even in space, someone has to deal with the trash and someone has to make the burgers.

Based on analysis of Lenticula, it is believed to be a fragment of one of the planets whose collision created the Planetary Belt between Aerius and Dapsilia.