Alderson disk

Therefore, for the entirety of such a structure to be made habitable, it would have to include a vast number of life support systems.

[5] In 1974, the science fiction writer Larry Niven suggested that an Alderson disk "would be a wonderful place to stage a gothic or sword and sorcery novel.

Rak Mesba is a partial ancient alien Alderson Disk in Orion's Arm, a multi-authored online science fiction world-building project.

In Terry Pratchett's science fiction novel Strata the concept of an Alderson disk is brought up by the protagonist, Kin Arad, as an explanation for the mysterious 'flat earth' that is the focus of the story.

In Gigastructural Engineering & More, a popular modification to the 4X game Stellaris, the Alderson Disk is featured as a buildable megastructure inhabitable by the player.

In the game Honkai: Star Rail, the planet of Penacony is actually a large artificial space station-like megastructure housing a hotel surrounded by two small Alderson disks orbiting it.

A schematic illustration of an Alderson disk