Here’s another stunning picture of the bright-dark terrain boundary on Iapetus. Prior to this encounter, we only had a distant global view of the satellite showing the leading hemisphere (in its orbital motion around Saturn) to be quite dark and the trailing hemisphere to be mostly bright (like most icy moons at Saturn). These new images show black deposits near the boundary that should help us uncover the origin of this material. Click the picture to go to the full resolution image and caption.

Image credit: NASA/JPL/Space Science Institute