UFO? Pan is Saturn's most inner moon, as seen in this illustration.
It orbits within the Encke Gap in the planet's A ring.
They look more like flying-saucers than icy moons, but Pan and Atlas are two of Saturn's strangest satellites.
Scientists have long been puzzled by how the oddly-shaped moons, which are only 20miles across, came to be.
Researchers based at the European Space Agency now think they have some answers after studying several years worth of cosmic images.
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