solar system: saturn

http://www.seasky.org/solar-system/assets/images/saturn07_sk12.jpg

This Cassini mosaic image shows that Saturn's stunning system of rings is much more complex than originally thought. They are composed of hundreds of smaller rings and gaps like the groves on a phonograph record. (NASA/JPL/Space Science Institute)

http://www.seasky.org/solar-system/saturn.html

http://www.geol.umd.edu/~jmerck/geol212/lectures/21.html