Jupiter’s atmosphere is quite simply a work of art. With an atmosphere that best resembles the sun, Jupiter is predominantly made up of hydrogen and helium, with trace amounts of ammonia, sulfur, methane and water vapor. Strong east-west winds in the planet’s upper atmosphere travel at 400 mph, with dark belts and light zones reflecting different compositions of chemicals.

Link: https://www.mnn.com/earth-matters/space/blogs/behold-dreamy-beauty-jupiters-clouds