Diskworlds (A1-0)
Diskworlds are ring-shaped habitats that enclose nearly their entire diameter to provide an extensive and diverse habitable volume. Aside from an open cylindrical space at the center of the disks for docking spacecraft, virtually the entire volume of the rings is enclosed and used for habitation or related purposes.
They are very ubiquitous megastructures in the Galactyan Empire thanks to their versatility, and are often part of Dyson Swarms and other groups of orbital habitats. They are often used
Structure
Diskworlds are typically constructed out of Diamondoid, Carbon Nanotube Buckytube and other highly resistant materials. They are usually similar in size to Bishop Rings: however, they can can get much larger thanks to the fact that they don't spin, and therefore the stress applied on the construction materials is far smaller. Diskworlds are very diverse, and depending on their intended purpose, they can be vastly different from one another. Some Diskworlds may have multiple levels of habitation extending inward from the outer rim, the exact number of which depends on the distance between one layer and another: on the larger habitats, planetary scale or even larger living areas are possible. Some may instead have a single large habitable volume extending from the outer rim to the inner core with occasional bracing structures running from edge to edge. Airwalls and other environmental systems work to maintain an even level of air pressure throughout the structure, which often support large aerial and arboreal ecosystems and are often home to flying or gliding sentient and sapient populations. Certain Diskworlds may instead be partially or completely be constructed out of Computronium and the related support infrastructure, hosting large virtual populations: Computronium Diskworlds are more often found orbiting Archailect ISO Nodes, such as Jupiter Brains, Matryoshka Micronodes, Moon Brains and planets outfitted with BioGeoComputing Nodes. Lastly, some Diskworlds have a fractal honeycomb of chambers, varying in size from meters to hundreds of kilometers across. Individual chambers or groups of chambers are designed to serve whatever purpose is desired, from manufacturing, to urban centers, to nature reserves, and more.
It's however not uncommon for Diskworlds to be a combination of all of the above options and more, depending on the kinds of populations and/or purposes the Diskworld is characterized by.