Uranus is a large gaseous planet.
Uranus is denser than Jupiter and Saturn.
Uranus is composed of hydrogen, helium, a substantial amount of water and probably some methane, ammonia, rock and metal.
A little amount of methane in Uranus's upper atmosphere gives it a blue green color.
The temperature in the upper atmosphere is only about 60° K but with atmospheric depth the temperature increases.
Below the thick clouds there may be a vast ocean of water heated to several thousand degrees Kelvin, but it does not boil away because of the great amount of pressure from above.
The core of the planet is most likely rock and metal.
Scientists believe that Uranus was hit by a comet and knocked on its side.