Shadow Between the Shepherds

Saturn's moon Prometheus casts a shadow near a streamer-channel created by the moon in the thin F ring in this image taken about a month after the planet's August 2009 equinox.Pandora (81 kilometers, 50 miles across) can also be seen on the right of the image. Pandora orbits outside the F ring and, with the inner shepherd moon Prometheus, helps to keep the narrow lanes of the F ring in check. The