The "Xanadu Annex" on Titan: This synthetic-aperture radar (SAR) image was obtained by NASA's Cassini spacecraft on July 25, 2016, during its "T-121" pass over Titan's southern latitudes. | NASA / JPL-Caltech / ASI / Université Paris-Diderot

Cassini Spies Incredible Detail in Titan's Dune Fields

In new observations by NASA's Cassini mission, 'dune moon' Titan reveals new and intricate details.

September 20, 2016
2:47 PM EDT