Keck images of Titan made during three nights in December 2001. The upper row shows Titan's troposphere (lower atmosphere), which contains the newly discovered south polar methane clouds. Images in the lower row show Titan's surface rotating as well as the same methane cloud features near the south pole. CREDIT: H.G. Roe, I. de Pater, B.A. Macintosh, C.P. McKay
