the-star-stuff:

Meet Iapetus, Saturn’s mysterious “yin-yang” moon

More than 60 moons are known to orbit Saturn, but few of them are as visually striking as Iapetus. Named formally after the Greek mythological Titan, Iapetus is sometimes referred to as the “painted,” or “yin-yang” moon, due to puzzling variations in its surface composition.

Photo by The Cassini Imaging Team, via NASA

(via theadventuresofmichaelpawlak)