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Unformatted text preview: The H:C ratio on both Jupiter and Saturn are very close to that of the sun - in the range 1-3 x solar. Yet the N:H ratio on Jupiter is several times lower than solar. This may be due to the NH 3 having condensed out. The N:H ratio on Saturn shows even less N than expected. The Helium abundances - measured from spacecraft flybys by looking at the effect of Hydrogen-Helium collisions on the absorption of long-wavelength infra-red radiation) - gives H/He of 17.2 +/12 for Jupiter and 32+/- 8 for Saturn, compared to 14.4 for the Sun. The Jovian cloud band structure looks at first sight complex and randomt sight complex and random, but this structure is apparently very stable: The same seems to be true of the Saturnian system. The different bands on both planets also seem to rotate to a large extent with different speeds, decoupled from their neighbours:...
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- Fall '10
- Astronomy, Planet, large planetary body, Jovian cloud band