Iapetus (moon)
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Iapetus is the outermost of Saturn's large moons. With an estimated diameter of 1,469 km, it is the third-largest moon of Saturn and the eleventh-largest in the Solar System. Named after the Titan Iap
Iapetus in true color, as imaged by the Cassini orbiter in September 2007. Iapetus's unusual two-tone coloration can be seen, along with its massive equatorial ridge on the right limb.
Giovanni Domenico Cassini, discoverer of Iapetus
Side view of Iapetus's orbit (red) compared to the other large moons, showing its unusually high inclination
Size comparison between Iapetus (lower left), the Moon (upper left) and Earth
Dione (moon)
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Dione is the fourth-largest moon of Saturn. With a mean diameter of 1,123 km and a density of about 1.48 g/cm3, Dione is composed of an icy mantle and crust overlying a silicate rocky core, with rock
Dione photographed by the Cassini spacecraft in 2008
Size comparison of Earth, the Moon, and Dione.
Dione in true color.