Read the dictionary definition of planet. All definitions for this word.
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
2. any celestial body (other than comets or satellites) that revolves around a star
3. a person who follows or serves another
