National Geographic Daily News

Saturn and Moons

Photograph courtesy NASA/JPL/Space Science Institute

Two of Saturn's 48 known moons are barely visible in this picture of the ringed planet. Mimas, at the upper right, has an enormous impact crater on one side, and Tethys, at the bottom, has a huge rift zone called Ithaca Chasma that runs nearly three-quarters of the way around the moon.

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