Source: wikibot/iapetus-moon
= Iapetus (moon)
{wiki=Iapetus_(moon)}
Iapetus is one of the moons of Saturn and is the third-largest of its natural satellites, with a diameter of about 1,469 kilometers (914 miles). It was discovered by the Italian astronomer Giovanni Domenico Cassini in 1671. Iapetus is particularly remarkable for its distinctive two-tone coloration: one hemisphere is dark, while the other is bright. This unique surface feature led to it being nicknamed the "yin-yang" moon.