Last updated on April 19, 2014 at 1:20 EDT

Latest Dione Stories

2004-12-31 07:40:00

JPL -- NASA's Cassini spacecraft is set to cap off 2004 with an encounter of Saturn's ying-yang moon Iapetus (eye-APP-eh-tuss) on New Year's Eve. This is Cassini's closest pass yet by one of Saturn's smaller icy satellites since its arrival around the ringed giant on June 30 of this year. The next close flyby of Iapetus is not until 2007. Iapetus is a world of sharp contrasts. The leading hemisphere is as dark as a freshly-tarred street, and the white, trailing hemisphere resembles...

2004-12-17 08:40:00

LOS ANGELES (AP) -- The Cassini spacecraft's close flyby of Saturn's mysterious moon Titan this week revealed clouds that will give clues to its weather, but the pass left scientists still puzzled about its surface. A flyby of another of the ringed planet's many moons, Dione, produced more immediate rewards: It revealed that wispy features long thought to be ice deposits are actually tectonic fractures that have left ice cliffs. The findings were released Thursday by members of the mission's...

2004-12-17 08:25:00

JPL -- Cassini's second close flyby of Titan completes a 'before' and 'after' look at the fuzzy moon and provides the first direct evidence of changing weather patterns in the skies over Titan. In images obtained less than two months ago, the Titan skies were cloud free, except for a patch of clouds observed over the moon's south pole. In images taken Monday, Dec. 13, during Cassini's second close flyby of Titan, several extensive patches of clouds have formed. "We see for the first time...

2004-12-16 07:59:25

The close approach of the Cassini probe, now flying by Saturn's moons, Dione and Titan, reveals a complex atmosphere with clouds hovering over what may prove next month to be continents and even oil-rich oceans. Astrobiology Magazine -- The map of Saturn's moon Dione, generated from Cassini images taken during the spacecraft's first two orbits of Saturn, illustrates in the banner image, the imaging coverage planned during Cassini's first Dione flyby on Dec. 14, 2004. Colored lines enclose...

2004-12-14 07:15:35

JPL -- The Cassini spacecraft completed a successful rendezvous with Saturn's moon Titan today. This was the last pass before the European Space Agency's Huygens probe is sprung loose from Cassini on Christmas Eve. Information gathered during this flyby will provide an opportunity to compare images from Cassini's first close Titan encounter on Oct. 26. NASA's Deep Space Network tracking station in Madrid, Spain, acquired a signal at about 4:00 p.m. Pacific Standard Time (7:00 p.m. Eastern...

Latest Dione Reference Libraries

2004-10-19 04:45:41

Saturn's moon Rhea -- Rhea is the second largest moon of Saturn. It was discovered in 1672 by Giovanni Cassini. Rhea is an icy body with a density of about 1.24 gm/cm3. This low density indicates that it has a rocky core taking up less than one-third of the moon's mass with the rest composed of water-ice. Rhea's features resemble those of Dione, with dissimilar leading and trailing hemispheres, suggesting similar composition and histories. The temperature on Rhea is -174°C in direct...

2004-10-19 04:45:41

Saturn's moon Helene -- Helene is a moon of Saturn, discovered by Laques and Lecacheux in 1980 from ground-based observations. It is co-oribtal with Dione and located in its leading Lagrangian point (L4) and hence is sometimes referred to as "Dione B". ----- Orbital radius: 377,400 km Diameter: 33 km (36 x 32 x 30) Mass: Unknown Orbital period: 2.7369 days Orbital inclination: 0.2 ----- NASA Learn more on this topic from eLibrary here:

2004-10-19 04:45:41

Saturn's moon Dione -- Dione is a moon of Saturn discovered by Giovanni Cassini in 1684. It is composed primarily of water ice, but as the densest of Saturn's moons (aside from Titan, whose density is increased by gravitational compression) it must have a considerable fraction of denser material like silicate rock in its interior. Though somewhat smaller, Dione is otherwise very similar to Rhea. They both have similar compositions, albedo features and varied terrain. Both have dissimilar...

Telesto (Saturn Moon)
2004-10-19 04:45:41

Telesto is a small Trojan moon of the sixth planet from the sun, Saturn. Telesto, which was discovered in 1980 by Smith, Reitsema, Larson and Fountain, is one of around 200 natural satellites in Saturnian orbit. It is one of only 62 moons that have a secure orbit, and only one of 53 named moons orbiting the ringed planet. Telesto was officially designated S/1980 S 13 and was officially named in 1983 after the Greek sea goddess of the same name. This moon is also designated as Saturn XIII...

2004-10-19 04:45:41

Saturn's moon Tethys -- Tethys is a moon of Saturn that was discovered by Giovanni Cassini in 1684. Tethys is an icy body similar in nature to Dione and Rhea. The density of Tethys is 1.21 g/cm3, indicating that it is composed almost entirely of water-ice. Tethys's surface is heavily cratered and contains numerous cracks caused by faults in the ice. There are two different types of terrain found on Tethys, one composed of densely cratered regions and the other consisting of a dark...

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