| http://www.w3.org/ns/prov#value | - If hydrogen, helium, and other elements were present in the same proportions as in the Sun???s atmosphere, Saturn???s atmosphere would be about 71 percent hydrogen and 28 percent helium by mass.The remaining major molecules that have been observed in Saturn???s atmosphere are methane (CH4) and ammonia (NH3), which are a factor of two to five times more abundant relative to hydrogen than in a gas o
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