Formation of Atlas, one of the small inner moons of Saturn. Its flat, ravioli-like shape is the result of a merging collision of two similar-sized bodies. The picture is a snapshot in mid-collision, before the moon’s reorientation due to tides is completed.
The small inner moons of Saturn look like giant ravioli and spaetzle. Their spectacular shape has been revealed by the Cassini spacecraft. For the first time, researchers of the University of Bern show how these moons were formed. The peculiar shapes are a natural outcome of merging collisions among similar-sized little moons as computer simulations demonstrate. When Martin Rubin, astrophysicist at the University of Bern, saw the images of Saturn's moons Pan and Atlas on the internet, he was puzzled. The close-ups taken by the Cassini spacecraft in April 2017 showed objects that NASA described in its news release as flying-saucers with diameters of about 30 km. With their large ridges and bulbous centres, Pan and Atlas also resembled giant ravioli.
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