Bok
06-07-2017, 03:51 PM
From high above Saturn's northern hemisphere, NASA's Cassini spacecraft gazes over the planet's north pole, with its intriguing hexagon and bullseye-like central vortex.
More... (http://www.nasa.gov/image-feature/jpl/pia21331/mimas-dwarfed)
More... (http://www.nasa.gov/image-feature/jpl/pia21331/mimas-dwarfed)