What are the atmospheric conditions of Jupiter?

Answer 1

The composition of Jupiter's atmosphere is quite different from Earth's--Jupiter is composed mostly of hydrogen and helium, the same elements that make up most stars. In fact, we expect that Jupiter has basically the same composition as the Sun. Like the Sun, Jupiter has its own heat source, but Jupiter's heat comes from heat left over from the formation of the planet 4.5 billion years ago, and heat produced today due to the slight contraction of the planet under its own gravity. This means that Jupiter's composition might be very much like the original solar nebula from which it--and the solar system--formed, so investigating Jupiter's atmosphere is a way for us to investigate the early solar system.