The ice giants, Neptune and Uranus, are not actually icy. While there are some ice crystals in their upper atmospheres, they're actually mostly liquid (technically supercritical fluid).
Image: NASA/JPL
The ice giants, Neptune and Uranus, are not actually icy. While there are some ice crystals in their upper atmospheres, they're actually mostly liquid (technically supercritical fluid).
Image: NASA/JPL