Wonderful Trio, in Saturn's Space

Caption originale:"The three very different moons seen here provide targets of great interest for planetary scientists studying the Saturn System. Captured here by Cassini, along with the Rings, are Tethys at upper right, Enceladus below center and Janus at lower left.
Researchers study the orbital dance of Janus (181 Km, or about 113 miles across) with Epimetheus, tectonics and cratering on Tethys (1.071 Km, or approx. 665 miles across) and geyser activity on Enceladus (505 Km, or about 314 miles across). And these are only a few of the wonders that await exploration in the realm of the Ringed Planet.

The image was taken in visible light with the Cassini spacecraft narrow-angle camera on March 16, 2006, at a distance of approx. 2,4 MKM (such as about 1,5 MMs) from Tethys; 1,9 MKM (about 1,2 MMs) from Enceladus and 2,2 MKM (roughly 1,4 MMs) from Janus. The image scale is about 14 Km (appx. 9 miles) per pixel on Tethys, 11 Km (about 7 miles) p. px. on Enceladus and 13 Km (about 8 miles) p. px on Janus".