A Shadow on the Rings of Saturn . ... Credit Copyright: Cassini Imaging Team , SSI , JPL , ESA , NASA Explanation: This picture of Saturn could not have been taken from Earth. No Earth based picture could possibly view the night side of Saturn and the corresponding shadow cast across Saturn's rings. ... Rather, this picture was taken by the robot Cassini spacecraft that began orbiting Saturn earlier this month. ... NASA Official: Jay Norris. ... U. Based on Astronomy Picture Of the Day ...