Titan

and so another world, Titan, Saturn's largest moon in a shot taken by the Cassini mission is heavily laden with a thick and smoggy atmosphere. (smog is not just a man made occurrence)
We know much of this moon thanks to the Hugen's probe included on the Cassini/Huygens mission, but there are still questions of this world. A moon with a thick atmosphere, very Earthlike features at the surface (as little as we have seen). One look at the surface, in a small area, says we need a broader search of this world. Questions, was this a star formation gone errant, incomplete star? (Saturn); Why are there gas giants? Beyond the questions is a world of discovery lets go have a look.