On 13 Marsh, 2006, NASA’s Cassini spacecraft took this edge-on view of Saturn’s rings, capturing the moon Mimas above the ring plane, illuminated both by the sun and by “saturnshine,” the tiny moon Janus just above the rings and larger Tethys below. Cassini took the photo from a distance of about 2.7 million kilometres (1.7 million miles), combining red, green and blue spectral filters to produce a natural colour view. Cassini’s mission ended 15 September, 2017, when the spacecraft, virtually out of propellant after its long, successful mission, was directed to plunge into Saturn’s atmosphere.
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Saturn’s moon Dione harbours a subsurface ocean
A subsurface ocean lies deep within Saturn’s moon Dione, according to new data from the Cassini mission. Two other moons of Saturn, Titan and Enceladus, are already known to hide global oceans beneath their icy crusts. Researchers believe that Dione’s crust floats on an ocean several tens of kilometres deep located 100 kilometres below the surface.