The bright dancing lights of the aurora are collisions between electrically charged particles from the sun that enter the earth's atmosphere. The lights are seen above the magnetic poles of the northern and southern hemispheres. They are known as 'Aurora Borealis in the north and 'Aurora australis in the south.

One of the earliest written texts mentioning the Northern Lights can be found in The Royal Mirror, which is considered a Norwegian textbook in social science from the 13th century. The Northern Lights are described as a natural phenomenon. The unknown author also gives it a name - Northern Urljos. The Northern Lights were not an unusual sight for people living in the far North and were a popular theme in folklore and superstition. In old Norse mythology, the northern lights were said to be Bifrost, the bridge between Åsgard and Midgard. Other stories hinted that the light was being reflected from the shields of the Valkyrie, the female angels of death who led fallen warriors to Valhalla. Finnish folklore tells that the Northern Lights come from sparks created by the tail of the fox as it runs over the snow. The Finnish name for the Northern Lights, "Revontulet", translates literally to  "fire-train".

Source: fjordtours.com/