Saturn Moon Rhea's Surprise: Oxygen-Rich Atmosphere
The March 2010 Rhea flyby trajectory and oxygen atmosphere distribution (as simulated by computer models). Inset: Predicted oxygen density (yellow), compared to Cassini's measurements (white) taken during the flyby.
Cassini Photo of Saturn Rings and 5 Moons
This photo, taken by NASA's Cassini spacecraft on July 29, 2011, shows Saturn's A and F rings and five of its moons. From left, the moons are Janus, Pandora, Enceladus, Mimas and Rhea.
Cassini Photo of Saturn Moons Rhea and Titan
Craters appear well defined on icy Rhea in front of the hazy orb of larger Titan in this view of the two Saturn moons. NASA's Cassini spacecraft snapped the photo on Dec. 10, 2011.
Saturn Moon Rhea Full View
This Cassini image taken during a Jan. 11, 2011 flyby shows Rhea in center stage, with Saturn's rings and three other moons in the background. Dione appears just above Rhea, with Tethys as the larger circle toward the upper left, and Epimetheus as the smaller dot to the left of Rhea.