The moon Tethys (in the upper left of the image) is seen next to Saturn in this NASA handout image from the Cassini spacecraft taken August 19, 2012 and released Dec 3, 2012. Saturn's rings appear to dwarf Tethys (1,062 kilometers across) although scientists believe the moon to be many times more massive than the entire ring system combined. The view was acquired at a distance of approximately 1.5 million miles (2.4 million kilometers) from Saturn. [Photo/Agencies]