Group: Dwarf Terrestrial Group
Class: GeoCyclic Class
Similar To: Mars is a EuArean world.
Sub Types: EoArean, MesoArean, EuArean, Arean-Lacustric

Arean worlds are small silicate rich worlds with a mostly dormant metallic core. They lose their magnetosphere, atmosphere and liquid water over time. Sometimes such worlds go through cycles of cooling and heating, but ultimately they are too small to retain enough energy to continue this indefinitely.