Titan's dense, smoggy atmosphere

Titan

Fig. 3.8b . By observing radiation at infrared wavelengths, on 8 July 2009, a Cassini instrument was able to penetrate through the moon’s atmosphere and catch the glint of sunlight reflected off a huge lake in the northern hemisphere of Titan; the lake is probably filled with liquid methane and ethane. (Courtesy of NASA/JPL/SSI and NASA/JPL/U. Arizona/DLR.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University