List Members,
It's the hexagonal, North Pole entrance into hollow Saturn:
http://newswatch.nationalgeographic.com/2013/12/04/cassini-photo-stunning-new-views-of-saturns-hexagon-storm/ http://newswatch.nationalgeographic.com/2013/12/04/cassini-photo-stunning-new-views-of-saturns-hexagon-storm/
What you are seeing is depth.
Dean