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Tethys and Tiny Atlas
Two of Saturn's moons are captured in this Cassini image, Tethys and tiny Atlas which is at the centre of the image, just outside Saturn's A ring. At 1,071 kilometers (665 miles) wide, Tethys is much bigger than Atlas, which is a mere 32 kilometers (20 miles) wide. A couple of faint ringlets are also visible in the Encke Gap on the right. This image was take on December 21, 2005, at a distance of nearly 2 million kilometers (1.2 million miles) from Tethys.
Fraser Cain