The Gas Giants - The Gas Giants The outer part of the solar...

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The Gas Giants The outer part of the solar system, beyond Mars and the asteroid belt, is dominated by the giant gas planets. There are four - Jupiter, Saturn, Uranus and Neptune, in that order - but although they are similar in many ways, we can also divide these into two sub-groups. Jupiter and Saturn form one: these are roughly the same size, and both have compositions thought to be near that of the primordial nebula. Uranus and Neptune are smaller than Jupiter and Saturn, are about the same size, and are deficient in Hydrogen and Helium compared to their larger brothers and the nebula composition. Temperatures From the thermal balance equations we looked at before we expect temperatures: Jupiter c. 106K Saturn c. 71K Uranus c. 58K Neptune c. 46.6K Actually, we find: Jupiter c. 126K (126/106) 4 = 2.3 times the effective heat output expected Saturn c. 95K (95/71) 4 = 3.2 times the effective heat output expected Uranus c. 55+/-3 K Neptune c. 57.2+/- 1.6K = (57/46) 4 = 2.7 times the effective heat
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The Gas Giants - The Gas Giants The outer part of the solar...

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