NASA’s Cassini spacecraft has found evidence of material orbiting Rhea, Saturn’s second largest moon. This is the first time rings may have been found around a moon. A broad debris disk and at least ...

A new study reveals a curious relationship between Saturn's moon Rhea and its neighbor, Titan. The second largest planet of the Solar System, Saturn is adorned by icy rings and orbited by a veritable ...

Saturn's battered, icy moon Rhea comes into sharper focus in a new set of snapshots from a robotic NASA probe. NASA's Cassini spacecraft snapped the raw, unprocessed pictures on March 10 while making ...

Newly released for the holidays, images of Saturn’s second largest moon Rhea obtained by NASA’s Cassini spacecraft show dramatic views of fractures cutting through craters on the moon’s surface, ...

Rhea and Dione seem like dark and light fraternal twins in this Cassini spacecraft image, with each of these two Saturnian moons displaying a large crater oriented similarly in the northern hemisphere ...

Saturn's rings will appear to have disappeared if you catch a glimpse of the planet through the eyepiece of a telescope on ...

Thirteen years ago, the Cassini-Huygens spacecraft was orbiting Saturn, not yet through its first mission, when a set of telescopes on board observed an unknown ultraviolet signal. The intriguing data ...

A mystery on Saturn’s moon Rhea may have finally been solved. When NASA’s Cassini spacecraft flew past the planet’s second-largest moon before the end of its mission in 2017, it spotted a mysterious ...

On Dec. 23, 1672, Italian astronomer Giovanni Cassini discovered Rhea, Saturn’s second-largest moon. Rhea is made up of rock and ice and is covered in craters. Rhea is also the only moon discovered to ...

Pictures from Rhea reveal the composition and structure of the icy Saturnian moon in festive colors of green, blue and 3-D red. They're a holiday gift from the scientists who work with the imagery ...