The outer ring, Adams, was named after John Couch Adams who is credited with the co-discovery of Neptune. Although the ring is narrow at only 35 kilometers wide, it is the most famous of the five due to its arcs. Although the Adams ring has five arcs, the three most famous ones are Liberty, Equality, and Fraternity. The arcs are the brightest parts of the rings and the first to be discovered. Scientists are unable to explain the existence of these arcs because according to the laws of motion they should distribute the material uniformly throughout the rings.
The rings of Neptune are very dark, and probably made of organic compounds that have been baked in the radiation of space.
This is similar to the rings of Uranus, but very different to the icy rings around Saturn. They seem to contain a large quantity of micrometer-sized dust, similar in size to the particles in the rings of Jupiter. In this image, the main clumpy arc, composed of three features each about 6 to 8 degrees long, is clearly seen.
This image was obtained when Voyager was 1. Exposure time was seconds. Photojournal: PIA This atmosphere close-up shows bright clouds in Saturn's northern hemisphere being sheared apart. The clouds at the bottom of the image are tilted and stretched because the wind at those lower lati The ancient and battered surface of Saturn's moon Rhea shows a notable dark swath of territory near the eastern limb in this image from Cassini.
This view shows principally the Saturn-facing hemi This image from NASA's Dawn spacecraft shows many linear or sinuous grooves crisscrossing the surface of asteroid Vesta. They were created when large pieces of debris grazed and scoured the surface.
Markings of Ejected Material on Vesta's Surface. This Voyager 2 high resolution color image, taken 2 hours before closest approach, provides obvious evidence of vertical relief in Neptune's bright cloud streaks.
Neptune Clouds Showing Vertical Relief. The Cassini spacecraft stares directly into the great Odysseus impact basin on Tethys. Peaks near the crater's center cast long shadows toward the east. The elevated eastern rim of the crater catch Odysseus Out of Shadow. Prometheus draws material from the F ring along an invisible thread of gravity. Near lower left is an identical feature the moon created on a previous pass near the ring. Prometheus kilometer Moon at Work.
This map of Saturn's moon Titan shows the location mapped with the Cassini radar mapper using its Synthetic Aperture Radar imaging mode on April 30, The global map shows the areas mapped so Radar Flyby of Titan - April 30, High in the Titan Atmosphere.
This image from NASA's Dawn spacecraft shows a part of the heavily cratered terrain in asteroid Vesta's northern hemisphere. Some of the craters have fresh, sharp rims, which suggests that they are Cratered Terrain. Faint features in Saturn's innermost ring, the D ring, are brought into view in this strongly contrast-enhanced Cassini image. A few background stars are visible through the sheer ring as squiggly D-Ring Structure.
The ever-changing F ring appears as wisps of smoke in this image taken downstream of the shepherd moon, Prometheus. The image was taken in visible light with the Cassini spacecraft narrow-angle ca Smokey Ring. This colorful view from NASA's Cassini mission is the highest-resolution view of the unique six-sided jet stream at Saturn's north pole known as "the hexagon.
Saturn's Streaming Hexagon Storm. The Cassini spacecraft was there to snap a photo of not only us, but the Saturn system. Enceladus in the E Ring by Val Klavans. The Cassini orbiter has revealed many surprises within the Saturn system, including the possible presence of a ring of debris surrounding the ancient heavily cratered surface of Rhea, Saturn's Rhea's Blue Streaks Looking South.
Many features in Saturn's rings are thought to be induced by the gravity of the planet's moons. This view shows two different kinds of waves that are thought to be produced by different moon-relate Two Kinds of Wave. Streaks on Dione. Rheasilvia is located in Vesta's southern hemisphere.
South Pole Vistas. As ring particles emerge from the darkness of Saturn's shadow, they pass through a region of twilight.
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