Saturn’s moon Iapetus. Image credit: NASA/JPL/SSI. Click to enlarge Cassini captured these images of Saturn’s moon Iapetus, with opposing bright and dark hemispheres. The dark terrain extends from the equator to the mid southern regions, and then becomes more patchy leading to its bright south pole. Cassini took this photograph on April 9, 2006, at … Continue reading Iapetus in Dark and Light