Saturn's auroras are produced similar to auroras on Earth. When the energetic solar wind sweeps past Saturn, the spectacular light shows were displayed on its poles. However, unlike on Earth, the auroras can only be detected using UV-sensitive instruments. This means that Hubble Telescope is on the green list. According to NASA, these auroras seem to be powered by the push-and-pull of Saturn's magnetic field and solar wind from the Sun. All in all, this phenomenon is a remarkable sight to see.  It seems that Jupiter would have a competition!

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Source: https://www.nasa.gov/multimedia/imagegallery/image_feature_1083.html