South Polar Vortex Discovered on Titan . ... Credit Copyright: Cassini Imaging Team , ISS , JPL , ESA , NASA Explanation: What's happening over the south pole of Titan? A vortex of haze appears to be forming, although no one is sure why. ... Cassini was only able to see the southern vortex because its orbit around Saturn was recently boosted out of the plane where the rings and moons move. ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ...