Mortal Plane
The Mortal Plane is the plane where living beings spend most of their time. It consists of the habitable planet Gaia and the god-controlled celestial bodies surrounding it. Mortals can only survive in Gaia's atmosphere, and space travel is unheard of—they would much rather journey to the Startree than attempt to fly into space. The Mortal Plane has Earth-like physics and a consistent cycle of time, things that some other planes lack.