NASA's Cassini Spacecraft is now reaching the end of its four-year prime mission (on June 30th), and about to enter into its extended mission. What a nice excuse for a retrospective of some of the great images sent back home by Cassini over the past four years. (12 photos total)
The Sun is on the opposite side, so all of Saturn is backlit. Courtesy NASA/JPL-Caltech
Swirls in Saturn's cloud-tops. Courtesy NASA/JPL-Caltech
The surface of Saturn's moon Dione, up close. Courtesy NASA/JPL-Caltech
Tiny moon Janus, seen before Saturn's rings, with massive moon Titan beyond. Courtesy NASA/JPL-Caltech
Saturn's moon Rhea, with Izanagi Crater at center. Courtesy NASA/JPL-Caltech
Saturn's horizon seen through its thin rings. Courtesy NASA/JPL-Caltech
Small moon Mimas, seen against Saturn's horizon. Courtesy NASA/JPL-Caltech
A "knot", or small disturbance in one of Saturn's outer rings. Courtesy NASA/JPL-Caltech
Closeup of small, cratered moon Hyperion. Courtesy NASA/JPL-Caltech
Saturn's moon Enceladus, seen just in front of Saturn. Courtesy NASA/JPL-Caltech
Saturn's polar region. Courtesy NASA/JPL-Caltech
Mimas closeup, with rings in background. Courtesy NASA/JPL-Caltech
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