11. The ionosphere, geomagnetism and aurorae were studied. 12. Energetic electrons entering its thin atmosphere are responsible for the observed Ganymedian polar aurorae . 13. The aurorae of Saturn are highly variable. 14. Today, the dominant theories are that the rain is caused by red dust aurorae . 15. A music video for the track " Aurorae " was released on 7 August 2014. 16. Both lightning and aurorae have been observed on other bodies after extensive study at Earth. 17. Uranus has relatively well developed aurorae , which are seen as bright arcs around both magnetic poles. 18. Solar energetic particles can cause particularly strong aurorae in large regions around Earth's magnetic poles. 19. Schove and Peng-Yoke have suggested that the phenomenon may be connected to sunspots and aurorae . 20. During the Maunder Minimum aurorae had been observed seemingly normally, with a regular decadal-scale cycle.
