This story was updated at 10 p.m. ET. A NASA spacecraft circling Saturn has discovered a wispy oxygen atmosphere on the ringed planet's icy moon Dione, but you wouldn't want to live there. For one ...

Mysterious straight bright stripes have been discovered on Saturn’s moon Dione, says research by Planetary Science Institute Associate Research Scientist Alex Patthoff. The origins of these linear ...

We recently explored Saturn’s walnut-shaped moon, Iapetus, to include its two-toned surface features and equatorial ridge. Now we’ll explore another one of Saturn’s moons that also exhibits unique ...

If Titan formed from a merger, the researchers found, its eccentric orbit could destabilize smaller moons closer to Saturn, ...

The plain-looking Saturn moon Dione may have once had a geologically active subsurface ocean, new images from NASA's Cassini spacecraft reveal. Images of Dione's 500-mile-long (800 kilometers) ...

This global map of Saturn’s moon Dione was created using images taken during flybys by NASA’s Cassini spacecraft. An extensive system of bright ice cliffs created by tectonic fractures adorns the moon ...

Saturn’s many moons offer an excellent chance to watch orbital dynamics in motion tonight. The ringed planet is visible above the southern horizon as soon as darkness falls. By 10 P.M. local time, it ...

Saturn’s moons Tethys and Dione are flinging great streams of particles into space, according to data from the NASA/ESA/ASI Cassini mission to Saturn. The discovery suggests the possibility of some ...

Just in time for Christmas (or Hanukkah, or Festivus, or...), NASA's Cassini probe has sent back some amazing photos of Titan, Dione, Tethys, and of Saturn herself. Share on Facebook (opens in a new ...

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 ...