Aetherspace
Aetherspace is that which separates the multitudinous planes of existence. The aetherways is that part of aetherspace that can be traveled by aether beings, including the extradiminsional algontherine (also known as aetherships). Occasionally, bubbles of reality form within aetherspace itself, each containing separate realities unto themselves. The most well-known aether bubble within aetherspace is the Facility, homeworld to the gnomes, whose expertise in planar travel remains unparalleled. They harvest and sell algontherine eggs, out of which grow the minds of aetherships, as well as constructing modules for aetherships and the extremely valuable diamonut artifacts.
The vastness of aetherspace should not be underestimated.