This image shows three of Saturn's small moons and a portion of its rings (left). The two shepherd moons, Prometheus and Pandora, guide particles in the F ring into a narrow band. Another small moon, Epimetheus, can be seen in the upper right corner of the image. This image was taken by the Cassini spacecraft on May 1, 2004 when Cassini was 31.4 million km (19.5 million miles) from Saturn.
Image courtesy NASA/JPL/Space Science Institute.