Iapetus (moon)
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Iapetus is a large moon of Saturn. It was discovered by Giovanni Domenico Cassini in 1671. Iapetus is unusual in that one side is very bright and the other side is very dark. When Cassini observed the moon, he could only see the moon on one side of Saturn. He concluded that the moon is darker on side than the other, later confirmed by the Voyager 1 spacecraft. Iapetus also has an equatorial ridge discovered by the Cassini-Huygens spacecraft on December 31, 2004.
| Moons of Saturn | |
|---|---|
| Generally listed in increasing distance from Saturn. Temporary names in italics. | |
| Ring shepherds | (moonlets) · Pan · Daphnis · Atlas · Prometheus · S/2004 S 6? · S/2004 S 4? · S/2004 S 3? · Pandora |
| Co-orbitals | Epimetheus · Janus |
| Inner large (and Trojan) |
|
| Outer large | Rhea (rings) · Titan · Hyperion · Iapetus |
| Inuit group | Kiviuq · Ijiraq · Paaliaq · Siarnaq · Tarqeq |
| Norse group |
Phoebe · Skathi · S/2007 S 2 · Skoll · S/2004 S 13 · Greip · Hyrrokkin · Mundilfari · Jarnsaxa · S/2006 S 1 · S/2004 S 17 · Narvi · Bergelmir · Aegir · Suttungr · S/2004 S 12 · Bestla · Farbauti · Hati · S/2004 S 7 · Thrymr · S/2007 S 3 · S/2006 S 3 · Surtur · Kari · Fenrir · Ymir · Loge · Fornjot |
| Gallic group | Albiorix · Bebhionn · Erriapo · Tarvos |
| Rings of Saturn · Cassini-Huygens · Themis · Chiron | |
