This little moonlet is thought to be about 20 miles wide, and it’s located in a 200-mile-wide gap in Saturn’s rings known as the Encke Gap. In fact, Pan is known as a shepherd moon, meaning it moves ring particles around during its orbit and actually keeps the Encke Gap “open.” That bulge around the moon is thought to be material from Saturn’s rings that Pan has collected during its trip around the planet.
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