Titan's winter polar vortex imaged by the Cassini Spacecraft's ISS camera. The vortex is now in deep winter and can only be seen because the polar clouds within the vortex extend high above Titan's surface into the sunlight. The vortex was extremely cold from 2012-2015 giving rise to unusual nitrile ice clouds. NASA/JPL-Caltech/Space Science Institute/Jason Major
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