The night sky is a dark place, with only the moon and stars to cast any light. But throughout the long winters high in the northern hemisphere there are nights that are illuminated with spectacular displays of green and blue light dancing across the skies
Astronomy Photographer of the Year 2014: the shortlist - in pictures
Wolves and the Northern Lights. Northern lights or Aurora Borealis is a natural light display in the night skies in the high attitude regions of the Arctic.Eskimos believed it was the dance of animal spirits.