The nothern lights (aurora borealis) are the result of electrons colliding with the upper reaches of Earth's atmosphere. This is one of the main attractions that brings visitors to Iceland.  This video shows them dancing across the Iceland skies in beautiful colors. It is truly one of the most amazing experiences to witness in person. If you wish to see the northern lights you should book your trip to Iceland between September and mid-April or you can just watch this video and experience it from your own home!