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Related to inferior planet: Interior planets
Either of the planets Mercury or Venus, whose orbits lie between Earth and the sun.
(Celestial Objects) either of the planets Mercury and Venus, whose orbits lie inside that of the earth
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|Noun||1.||inferior planet - any of the planets whose orbit lies inside the earth's orbit|
major planet, 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