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gas giant
(redirected from Gas Giants)

   Also found in: Wikipedia, Hutchinson 0.53 sec.
gas giant
A large, massive, low-density planet composed primarily of hydrogen, helium, methane, and ammonia in either gaseous or liquid state. Gas giants have swirling atmospheres primarily of hydrogen and helium, with no well-defined planetary surface; they are assumed to have rocky cores. They are also characterized by ring systems, although only Saturn's is readily visible from Earth. Our solar system contains four gas giants: Jupiter, Saturn, Uranus, and Neptune. The majority of extrasolar planets discovered so far are the size of the solar system's gas giants, although they orbit their stars much more closely and may differ in composition from ours. Also called Jovian planet. Compare terrestrial planet.
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Noun1.gas giant - any of the four outermost planets in the solar system; much larger than Earth and gaseous in nature (like Jupiter)
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

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And unlike the gas giants Saturn and Jupiter, Neptune and its neighbor Uranus are heavy and made of ice and rock.
Saturn While the other gas giants also have rings, Saturn's rings span the farthest.
Create a leaflet to help the local community learn the difference between the inner planets and the gas giants.
 
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