The Aurora Borealis (Northern Lights) happens when a Coronal Mass Ejection from Grandfather Sun sends solar winds to hit the Earth, at around 45 million MPH, interacting with the Earth's magnetic fields. It's quite a violent event and highlights how important it is to keep the Earth's atmosphere as healthy as possible. This set was filmed in Iceland. You can see a video of the Aurora Borealis in part of this video:
https://www.youtube.com/watch?v=liWDe14tpj8