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Giant space 'snowballs' hit Saturn's outermost ring

Six images showing trails made by snowballs that hit Saturn's outermost ringNASA/JPL-Caltech/SSI/QMUL

Giant space 'snowballs' are smashing through Saturn's outermost ring, Nasa scientists have discovered.

These images from the Cassini spacecraft show icy objects half a mile wide punching through the planet's F Ring, leaving a glittery trail.

The snowballs are formed by the gravity of the moon Prometheus pushing together icy particles from the ring.

Until now, scientists didn't know what happened to them after they were created.

Image of SaturnNASA
Saturn is famous for its rings

Carl Murray from the Cassini team called the F Ring Saturn's "weirdest ring".

He said: "The F Ring region is like a bustling zoo of objects from a half mile in size to moons like Prometheus a hundred miles in size, creating a spectacular show."