Close-up image of Saturn's rings showing unusual wave patterns near the Keeler gap. These waves are caused by the gravitational influence of a newly discovered, small moon orbiting within the gap. The image, a digitally foreshortened mosaic from the Cassini spacecraft, reveals the moon's effect on the ring particles' orbits.

Astronomy Picture from 23/05/2005

A Wave Maker Moon in Saturn's Rings

Source: https://apod.nasa.gov/apod/ap050523.html


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