This is a drawing showing the composition of the interior of Uranus.
The Composition of Uranus' Interior
The composition of Uranus' interior is mostly complex molecules such as methane and ammonia, in the form of ice.
Ice begins forming in the atmosphere of Uranus, near the methane cloud deck. That may seem funny considering the atmosphere is getting warmer there, but the barometer (pressure) is also increasing, and that has an effect on transforming methane from gas to ice.
The amount of ice in the air keeps increasing until there is slush, and then solid ice. This ice is warm (for Uranus) and can flow in a similar fashion to the warm silicate layers of Earth.
Compared to Jupiter and Saturn, Uranus has very little metallic hydrogen, and there is much more ice. The drawing shows an abundance of
purple ice "cubes" compared to that of Jupiter. Because the magnetosphere comes from the metallic layer, this means that Uranus should have a much smaller magnetosphere than does Jupiter.
The core of Uranus is made out of heavier, rocky and metal elements such as silicates and iron.
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