On the Cover: Sunlight scatters off Titan's thick atmosphere, illuminating a crescent as Voyager 2 looked back on the night side of Saturn's largest satellite. In this false color image, a thin blue haze layer completely outlines the satellite. Organic compounds color the enshrouding clouds, giving Titan a distinct orangish hue. Such organic compounds were the precursors of life on Earth, and by studying Titan we may learn about our own origins. JPL/NASA
3 "No Small Rapture": The Exploration of Saturn's Moon Titan: Carl Sagan goes into the history of our knowledge of Saturn's largest moon.
6 A Glimpse of the Past? The Evolution of Titan's Atmosphere: Tobias Owenexplains how studying Titan may help us understand the origins of life on Earth.
9 Discovering Organic Molecules on Titan: Rudolf Haneland John Pearldiscuss how organics on Titan were discovered.
11 Mucky Seas and Hazy Skies: An Ethane Ocean on Titan? Jonathan I. Lunineexamines Voyager's possible detection of oceans—but not filled with water—on Titan.