As Seen by Cassini: Saturn’s Rings & Tiny Moon Prometheus

Saturn’s rings and moon Prometheus, as seen from the international Cassini spacecraft in August 2017. (NASA/JPL-Caltech/Space Science Institute)

As the 13-year international Cassini mission to explore Saturn draws to a close, the spacecraft has been diving between the gas giant and its innermost rings to explore uncharted territory before finally plunging one final time into the planet on Sept. 11.

In this photo, Saturn’s tiny moon Prometheus – just 53 miles wide – can be seen as a faint speck near the planet’s narrow and ghostly F-ring.

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