Shadows from the Waves

Shadows are cast by Daphnis and the moon's attendant edge waves
in this Cassini spacecraft image taken about a month and a half before the
Saturn's August 2009 equinox. Daphnis (8 kilometers, or 5 miles across) appears
as a tiny bright dot in the Keeler Gap of the A ring near the center of the
image. The moon has an inclined orbit and its gravitational pull perturbs the
orbits of the particles of the A ring forming the Keeler Gap's edge. It also
sculpts the edge into waves having both horizontal (radial) and out-of-plane
components.