This is a drawing showing the composition of the interior of Uranus.
The Composition of Uranus' Interior
The composition of Uranus' interior is methane, in the form of ice.
Ice begins forming in the atmosphere of Uranus, near the methane cloud deck. 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 like the rocky underground mantle layers of Earth.
Compared to Jupiter and Saturn, Uranus has very little metallic hydrogen, and there is much more ice. The drawing shows many more 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.
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