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Solved
(?) Puzzles of Saturn
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Outer atmosphere composition
different from Jupiter, Sun
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Jupiter, Sun: 80% hydrogen,
19% helium, 1% other
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Saturn: 88% hydrogen, 11%
helium, 1% other
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Generates 3 times more heat
than it receives from the Sun
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Jupiter generates twice as
much
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Why should Jupiter emit more
heat?
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Larger
bodies retain more he
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More
heat output contributes to higher wind speed
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Hypothesis:
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Saturn cold enough, dense
enough atmosphere to condense out liquid helium (like rain)
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Falling liquid helium rain
heated lower atmosphere by friction
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(potential energy lecture
demo)
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heat still escaping today
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