Project Orion
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Project Orion (astronomy), was a 1980 NASA initiative and design study to search for extrasolar planets using high-precision astrometry
Project Orion may also refer to:
- Spacecraft-related projects:
- Project Orion (nuclear propulsion), an engineering design study of spacecraft powered by nuclear pulse propulsion
- Project Orion, a project within the Constellation program to create the Orion (spacecraft) to replace the US Space Shuttle fleet
- Project Orion, the name of one of several projects to build a laser broom for the International Space Station
- Project Orion, an initiative organized by the Eclipse Foundation to improve browser support for software development
- Orion (laser), built in the UK to research thermonuclear explosions