Like Earth, Saturn features active and radiant auroras at its poles. To date, our impressions of these fantastic features have been fleeting and sporadic at best. But now, using several pairs of telescopic eyes, NASA has caught its best glimpse yet of these massive, swirling auroras.
Saturn's polar auroras become active when energetic electrons fall into the planet's atmosphere and collide with hydrogen molecules. Every once in a while, a blast of fast solar wind, comprised mainly of electrons and protons, generates glowing aurora.