Iapetus
Iapetus is the 3rd largest moon of planet Saturn, and has a massive equatorial ridge running three-quarters of the way around the moon, giving it the appearance of a walnut. Iapetus also has a striking two-tone coloration, with one hemisphere showing a bright water ice surface and the other hemisphere showing a dark color, possibly due to sublimation effects.
Type
Planetoid / Moon
Location under
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