Orbital (The Culture)
Appearance
An Orbital is a fictional purpose-built space habitat built by The Culture from Iain M. Banks' science fiction universe.
Banks has described them as looking like "a god's bracelet" hanging in space. Orbitals are hoops of superdense material (called base material). On the inside of the hoop, there are continental plates, and, above that, atmosphere. At the edges are "edgewalls," which obviously serve to ensure nothing falls off the edge of the Orbital, and are kilometers high.
See also: