A Storm on the Horizon
Unlike the Universe we are familiar with, in A Shadow Over Akeroth (SOA), the Universe in incredibly different. As a way to help gain immersion into the Universe several explanations have been given as follows:
Heavenly Spheres: The Planets themselves
Sol: The Solar System including the Planets, Moons, Sun and other Celestial Bodies visible from Akeroth
Planes: Regions of the Universe separate from the Solar System, but still connected to the Material Plane via a membrane-like substance.