Smithsonian Orbital Annex
- Civilian orbital museum associated with Smithsonian Museum, Washington DC, United States, Earth
- Final berth for various decommissioned space-going vessels, both civilian and military (ENT Novel: A Choice of Futures, Patterns of Interference)
- Largely devoted to vessels of significant cultural value to Earth as a whole or specific Earth fleets
- Established by 2129 (ENT Novel: Patterns of Interference)
- Known vessels in collection