NASA / JPL / SSI / color composite by Gordan Ugarkovic
Enormous storm on Saturn
On December 24, 2010, Cassini captured its first complete photos of a massive storm on Saturn that had already captured the fascination of amateur astronomers. The storm was first noticed on December 5 by the Radio and Plasma Wave Science (RPWS) team on Cassini, who detected its lightning emissions and alerted astronomers. Amateur astronomers photographed it shortly after.