Ices in the Giant Planets
Interior models show that Jupiter and Saturn consist mostly of free hydrogen and helium, while Uranus and Neptune consist mostly of material with a zero-pressure density near 1 g cm−3. The dominant material in Uranus and Neptune is almost certainly ice, while models imply that Jupiter and Saturn each contain roughly one Uranus or Neptune mass of non-hydrogen-helium material which is probably ice. Although the ice component of the giant planets is largely inaccessible to direct observation, a considerable body of indirect evidence suggests that these four planets contain the largest reservoirs of ice in the planetary system.
KeywordsGiant Planet Solar Nebula Hydrogen Equation Outer Planet Metallic Hydrogen
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