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1. (astronomy) any of the nine large celestial bodies in the solar system that revolve around the sun and shine by reflected light; Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto in order of their proximity to the sun; viewed from the constellation Hercules, all the planets rotate around the sun in a counterclockwise direction
   - major planet
    
2. A person who follows or serves another
   - satellite
    
3. Any celestial body (other than comets or satellites) that revolves around a star

Derived forms: planets

See also: interplanetary, planetary

Type of: celestial body, follower, heavenly body

Part of: solar system

Encyclopedia: Planet