Saturn's 'Yin-Yang' moon Iapetus

Saturn's 1436-kilometre wide moon Iapetus, with its light and dark hemispheres. The dark hemisphere is the side of Iapetus that leads in its orbit. In this view, both light and dark areas are visible.

The image was taken in visible light with the Cassini-Huygens spacecraft's narrow-angle camera on 23 May 2004, from a distance of 20.2 million kilometres from Iapetus. The image scale is 12 kilometres per pixel. The image was magnified to aid visibility.