Project Orion may refer to:
- Project Orion (nuclear propulsion), a study for a nuclear-powered spacecraft
- Orion (laser), built in the UK to research thermonuclear explosions
- Orion (spacecraft), a spacecraft part of the Artemis program
- The code name for the sequel of Cyberpunk 2077
- See also: Orion (disambiguation)
This disambiguation page lists articles associated with the title Project Orion.
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