- major planet as a noun:
- 1
major planet
noun
1 major planet
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.
synonym: planet.
Dutch: planeet
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