Planetary
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- Planetary is an adjective meaning relating to a planet or planets.
- A planetary nebula is an astronomical object that appears nebulous and disk-like in low-resolution observations. The name is due to a resemblance to planets, not a similarity to them.
- Planetary gearing is a gear system also known as epicyclic gearing.
- Planetary is a comic book series by Warren Ellis and John Cassaday.