Major-planet definitions

(astronomy) Any of the 8 celestial bodies which orbit the Sun: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
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(astronomy) Any planet that is significantly larger and more massive than Earth, containing large amounts of hydrogen and helium, such as Jupiter and Neptune.
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(astronomy) Those planets that are larger than the Earth; specifically Jupiter , Saturn , Uranus , Neptune (in the Solar System)
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(astronomy) A celestial body that fits the 2006 IAU definition of planet.
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