Saturn's Spectacular Sights Stun Skywatchers, On Earth, In Orbit And At Saturn Itself

Once per orbit, as the Earth completes its annual revolution around the Sun, it also passes and laps the outer worlds, who move so slowly they take decades -- or, in the case of Neptune and Pluto, centuries -- to complete even one orbit around our central star. It's for this very reason that Saturn, the farthest naked eye planet and slowest moving world relative to the backdrop of stars, has been known since antiquity as the "old man of the skies."