Wavy Shadows (edm)

Caption NASA:"Never-before-seen tall vertical structures created by Saturn's moon Daphnis rise above the Planet's otherwise flat, thin disk of Rings to cast long shadows in this Cassini image.
Daphnis, approx. 8 Km (about 5 miles) across, occupies an inclined orbit within the about 42-Km (approx. 26-mile) wide Keeler Gap in Saturn's outer A-Ring. Recent analyses by imaging scientists published in the Astronomical Journal illustrate how the moon's gravitational pull perturbs the orbits of the particles forming the Gap's edge and sculpts the edge into waves having both vertical and horizontal components.
Measurements of the shadows in this and other images indicate that the vertical structures range between one-half to 1,5 Km tall (about 1/3rd to one mile), making them as much as 150 times as high as the Ring is thick. The main A, B and C-Rings are only about 10 meters (about 30 feet) thick. Daphnis itself can be seen casting a shadow onto the nearby Ring".