Uranus's uppermost layer of clouds only contains water.
Uranus 's atmosphere is similar to Jupiter 's and Saturn 's in its primary composition of hydrogen and helium , but it contains more `` ices '' such as water , ammonia , and methane , along with traces of other hydrocarbons .	s	second	hydrogen	hydrogen	helium	helium	methane	methane	ammonia	ammonia	water	water (molecule)	Jupiter	Jupiter	Saturn	Saturn	atmosphere	Atmosphere#Others	ices	volatiles
