Definition of Iapetus in English:

Iapetus

Syllabification: I·ap·e·tus
Pronunciation: /īˈapetəs, ēˈap-
 
/
Astronomy
A satellite of Saturn, the seventeenth closest to the planet, discovered by Cassini in 1671. It has one bright icy side and one very dark side and a diameter of 907 miles (1,460 km).

Origin

named after a Titan of Greek mythology, son of Uranus (Heaven) and Gaia (Earth).

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