The Northern Lights are known as Aurora borealis.
They appear over and around the Arctic Circle.
Northern Lights are formed due to magnetic charges which are seen as the various colours. But Aurora borealis are generally associated with green colour.
The lights are beautiful,glorious and majestic.
The lights appear in their best form in Norway, where there is perpetual twenty four hours day for six months and complete darkness for six months.Those days where only night exists, Aurora borealis appears as a beautiful,lustrous and shining necklace across the sky.
It is wonder of nature,yet it is nothing but the clash of polar magnetic charges which produce various colours such as green, grey, pink,etc.
If time permits sometime visit any place where the lights are visible and watch them in action.