Saturn: Shadows of a Seasonal Sundial . ... Credit Copyright: Cassini Imaging Team , ISS , JPL , ESA , NASA Explanation: Saturn's rings form one of the larger sundials known. ... In 2009, during Saturn's last equinox , Saturn's thin rings threw almost no shadows onto Saturn, since the ring plane pointed directly toward the Sun. As Saturn continued in its orbit around the Sun, however, the ring shadows become increasingly wider and cast further south. ... NASA Official: Jay Norris. ...