The Citadel (n.)

Pronunciation: /ðə ˈsɪtədəl/

Etymology: From Latin cittadella (“little city”), from Old French cité (“city”). Adapted in space architecture to denote a large, fortified space station, drawing on the idea of a central, protected hub.

Definition: A zero-g/micro-g space station designed using Stationships, a variant of the SpaceX Starship, characterized by its cross-shaped configuration and significant cabin space (12,000 m³), requiring six launches for assembly. It facilitates a microgravity environment for various space operations.

Origin: The concept of "The Citadel" was introduced in a 2025 animation and post by KiwiThinker on X (formerly Twitter), representing a modern interpretation of space station design that leverages reusable spacecraft technology. It aims to make large-scale space habitation more feasible and cost-effective, building on the legacy of space stations like the International Space Station (ISS).

Example: "The Citadel, with its expansive 12,000 cubic meters of cabin space, is set to become a cornerstone for future space research and habitation, built efficiently with just six launches of Stationships."

Related terms: Stationships, SpaceX Starship, modular space station, micro-g, zero-g.