Planetary means relating to a planet or planets. It can also refer to:
Science
- Planetary habitability, the measure of an astronomical body's potential to develop and sustain life
- Planetary nebula, an astronomical object
People
- Planetary (rapper), one half of east coast rap group OuterSpace
Arts, entertainment, and media
- Planetary (comics), a comic book series by Warren Ellis and John Cassaday
- "Planetary (Go!)", a 2011 song by rock band My Chemical Romance
- Planetary Radio, a public radio show about space exploration, produced by The Planetary Society
Organizations
- The Planetary Society, the Earth's largest space interest group
Technology
- Epicyclic gearing (planetary gearing), an automotive transmission technology
- Planetary scanner, type of image scanner for making scans of rare books with mounted camera taking photos
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