The closest approach to Saturn

The crinkly, wavy shape of one of Saturn's narrowest rings when NASA's Voyager 1 spacecraft made its closest approach to Saturn was a surprise to NASA.

The image on the left from Voyager 1 was released on November 12, 1980, while the image on the right shows a closer view of the same F ring in a photograph shot by the Cassini spacecraft on April 13, 2005.

The moon Pandora can be seen to the left of the ring, and the moon Prometheus is to the right of the ring.