In new images from NASA's Cassini spacecraft, red arcs are clearly visible on the moon's surface, and are among the most unusual color features on Saturn's moons to be revealed by Cassini's cameras.
The images, obtained in April, are the first to show large northern areas of Tethys with such clarity. It also has helped that the Saturn system moved into its northern hemisphere summer over the past few years, meaning northern latitudes have become increasingly well illuminated .... http://www.cbsnews.com
