On July 19, 2013, in an event celebrated the world over, NASA's Cassini spacecraft slipped into Saturn's shadow and turned to image the planet, seven of its moons, its inner rings, and, in the background, our home planet, Earth.
This image from NASA's Cassini spacecraft reminds us of how different Mimas and Pandora are when they appear together; although both are moons of Saturn, Pandora's small size means that it lacks sufficient gravity to pull itself into a round shape.
Janus is spotted over Saturn's north pole in this image while Mimas' shadow glides across Saturn in this image from NASA's Cassini spacecraft. Janus is the faint dot that appears just above Saturn's north pole.
Although Mimas holds the unofficial designation of 'Death Star moon,' Tethys is seen here also vaguely resembling the space station from Star Wars. Apparently, Tethys doesn't want Mimas to have all the fun!
Scientists with NASA's Cassini mission have spotted two features shaped like the 1980s video game icon "Pac-Man" on moons of Saturn. One was observed on the moon Mimas in 2010 and the latest was observed on the moon Tethys.
Saturn's rings cast wide shadows on the planet, and the shadow of a moon also graces the gas giant in this scene from NASA's Cassini spacecraft. The moon Enceladus is not shown in this view, but it does cast a small, elongated shadow.
The shadow of the moon Mimas creates a smudge on the southern hemisphere of Saturn in this view from NASA's Cassini spacecraft. Mimas does not appear here, but it does cast its shadow on the planet in the lower left of the image.
Saturn's rings lie between a pair of moons in this view from NASA's Cassini spacecraft that features Mimas and Prometheus. Mimas is the more noticeable of the two moons at top left, Prometheus is near the center of image and closest to Cassini.
The largest storm to ravage Saturn in decades started as a small spot seen in this image from NASA's Cassini spacecraft on Dec. 5, 2010 -- the same day Cassini also detected frequent lightning signals.
A quintet of Saturn's moons come together in this portrait from NASA's Cassini spacecraft. Janus is seen on the far left, Pandora orbits near the middle, Enceladus appears above the center, and Rhea and Mimas are seen on the right side.
Saturn's small, potato-shaped moon Prometheus appears embedded within the planet's rings near the center of this view from NASA's Cassini spacecraft while the larger moon Mimas orbits beyond the rings.
Shadows adorn Saturn in this view from NASA's Cassini spacecraft, which also includes the moon Rhea, shown orbiting between the planet and the spacecraft and appears above the rings on the left of the image.
This image obtained by NASA's Cassini spacecraft of the outer edge of Saturns B ring, reveals the combined effects of a tugging moon and oscillations that can naturally occur in disks like Saturn's rings and spiral galaxies.
Keeping a close watch on the outer portion of Saturn's B ring, NASA's Cassini spacecraft records the complex inward and outward movement of the edge of the ring. This ring movement resembles the suspected behavior of spiral disk galaxies.
The outer edge of Saturn's B ring exhibits an unexpected feature in this image captured by NASA's Cassini spacecraft. The image was obtained when the sun was over the planet's equator and lit the rings exactly exactly edge on.