Arnia

Arnia was the fourth planet of the Arnian System. Frozen and desolate, the planet was largely ignored by the galaxy for millenia, leaving the sentient Arnian species to progress without alien interference.

Geology, Geography, and Ecology
Located in a little-traveled sector of the Inner Rim, Arnia orbited a small blue-white star, which the Arnians called Tsa'Dis. The planet consists of a cold, solid core, a liquid mantle, and a rocky crust. The surface is entirely covered by a frozen sheet of water. It is assumed that Arnia was once much more temperate, with mostly rocky terrain, before the planet's cooling core caused a pressure difference that cracked the crust, resulting in much of the liquid mantle flooding the surface. This major shift in planetary mass caused Arnia to drift into a wider orbit, resulting in drastically lower temperatures that froze the planet solid.