Astral dominions, sometimes simply called dominions or more archaically the Outer Planes, were distinct planes connected by the Astral Sea which were inhabited and maintained often, but not always, by one or more gods. In many ways an astral dominion was a plane in and of itself, and sometimes contained its own demiplanes. Nonetheless, each dominion was a part of the greater Astral Sea as described by the World Axis cosmology model.