Saturn's moon Pan may be small, but it has a big effect on the rings https://t.co/9lHQRxRDI2 http://pic.twitter.com/cIxPQU7sKH
— CassiniSaturn (@CassiniSaturn) September 19, 2016
via Twitter https://twitter.com/CassiniSaturn
September 19, 2016 at 08:27PM
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