Crowded Saturnian Skies...

As our robotic emissary to Saturn, the Cassini spacecraft is privileged to behold such fantastic sights as this pairing of two moons beyond the Rings. The bright, narrow F-Ring is the outermost ring structure seen here.
In this scene, bright Enceladus begins to slip in front of more distant Dione. Enceladus is closer to Saturn than Dione, and orbits the planet at greater velocity. Thus, the smaller moon eventually passed the larger one, as seen from the Cassini spacecraft, and continued on its way.

The image was taken with the Cassini spacecraft narrow-angle camera on March 3, 2006, using a filter sensitive to wavelengths of ultraviolet light centered at 338 nnmts and at a distance of approx. 2,6 MKM (about 1,6 MMs) from Enceladus and 2,7 MKM (such as about 1,7 MMs) from Dione. The view was taken from a phase angle (Sun-moon-spacecraft angle) of 139°; about the same angle with respect to both moons. Image scale is about 16 Km (roughly 10 miles) per pixel on Enceladus and Dione.