This is a drawing which depicts what Jupiter's atmosphere is made of.
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An Overview of Jupiter's Atmospheric Composition
Jupiter's atmosphere is mostly made of the simple molecules hydrogen and helium. There is a large amount of sulfur, which combines with some of the hydrogen to form hydrogen sulfide. There is also a large amount of nitrogen, which combines with the hydrogen to form ammonia. Oxygen is also present, which combines with the hydrogen to form water.
These molecules, ammonia, ammonia hydrosulfide, and water, form clouds at different levels in the atmosphere of Jupiter. They also form hazes of smog high up in the atmosphere.
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