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Planetary

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  1. Planetary is an adjective referring to a topic relating to planets.
  2. 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.
  3. Planetary gearing is a gear system also known as epicyclic gearing.
  4. Planetary is a comic book series by Warren Ellis and John Cassaday.