Yes, Obi-Wan, That’s a Moon

Saturn’s 250-mile-wide icy moon Mimas shines in direct sunlight and reflected light from Saturn in this image, a composite of raw images acquired by NASA’s Cassini spacecraft on Jan. 30, 2017 and received on Earth today, Feb. 1. This is a bit of a “Frankenstein” job I made, assembled from five separate narrow-angle camera images taken in…

Shadow Play

A series of images from Cassini shows the 110-mile-wide Janus passing through shadows cast by Saturn’s rings. Janus shares its orbit within the ring system with sister moon Epimetheus. Both are small, rocky worlds…irregularly-shaped clusters of rubble pockmarked by ancient craters and displaying lots of scrapes and gouges, evidence of glancing blows by larger bodies.