ASTRONOMY PICTURE

OF THE DAY

JANUARY 8, 2016

Prometheus and the F Ring

EXPLANATION

In Greek myth Prometheus was a Titan, known for bringing fire from Mount Olympus. But in modern times the name is given to a small moon of Saturn, orbiting just inside Saturn’s F ring. In a complex interaction, the tiny potato-shaped moon interacts with the icy ring particles creating structures along the F ring still not fully understood. One of the highest resolution views of Prometheus, this image of its pocked surface posing with the thin F ring in the background was taken during the Cassini spacecraft’s close approach on December 6, 2015. Elongated Prometheus is roughly 150 kilometers (90 miles) long by 70 kilometers wide.

Image Credit

Cassini Imaging Team, SSI, JPL, ESA, NASA