Realspace

Realspace is a general term referring to the standard 3rd dimensional spacial environment within each universe. Alternate realms, such as Hyperspace, are either stacked over or superimposed on realspace. Realspace, while containing matter and energy, is mostly made a vacuum-like emptiness known as Luminiferous Aether, with especially isolated regions being known as deep space. Various civilizations exist within realspace, and realspace is able to reduce the power levels of several extradimensional beings, also confining them to physical forms for as long as they are in realspace. Although alternate realms are not considered to be a part of realspace, they often operate with realspace physics.