At times, there are rare and stunning natural light displays in the sky. Among them is the phenomenon of the Northern Lights, which produces glowing green or subtly yellowish arcs.
The Northern Lights over Lake Derwent, near Keswick, England
This photo provided by the University of Alaska Fairbanks shows one of four NASA aerial reconnaissance rockets launched on January 26, 2015 for about half an hour into the Northern Lights in an effort to better understand and record turbulent gas flows in the upper atmosphere.
The light of the Northern Lights phenomenon in the sky near Salgotarjan, 9km north of Budapest, Hungary, March 18, 2015.
DeeDee Jonrowe race team arrives at a stop in Ruby, Alaska, when the Northern Lights are in the sky, at the Iditarod Trail Sled Dog Race.
Wind turbines at Consumers Energy’s Lake Winds Energy Park glow under the blue light of the Northern Lights appearing in Ludington, Michigan.
The Northern Lights over Oresund, the strait separating Denmark and Sweden.
A bright streak of the Northern Lights is seen on the horizon over Lake Kawartha, Southern Ontario.
The Northern Lights phenomenon appeared in the sky of Pilisszentkereszt, 26km north of Budapest, Hungary.
Under the light of the Northern Lights, the Ray Redington Jr race team arrived in Huslia, Alaska.
The Northern Lights illuminate the night sky over the Osnabrueck observatory, Germany.
Green light from the Northern Lights illuminates Dunstanburgh Castle, in Northumberland, England.