Saturn's orange moon Titan peeks from behind two of Saturn's rings. Small, battered Epimetheus, another of Saturn's 62 moons, appears just above the rings.

<p>Saturn's orange moon Titan peeks from behind two of Saturn's rings. Small, battered Epimetheus, another of Saturn's 62 moons, appears just above the rings.</p> <p>Story details: NASA's Cassini spacecraft has detected propylene, a chemical used to make...See more