Stefan Christmann / Emperor penguin (Aptenodytes forsteri) colony huddled together under the Southern Lights, Aurora australis, Atka Bay, Antarctica. September.

Jorma Luhta / Aurora borealis colours in night sky over lake, northern Finland (nr Arctic circle), October 2002. Auroras also occur in the southern hemisphere where they are know as Aurora australis.

Stefan Christmann / Emperor penguin (Aptenodytes forsteri) with its chick under the Southern Lights, Aurora australis, Atka Bay, Antarctica. September.

Frederique Olivier / View of the Aurora Australis, seen from Dumont D'Urville Station, Ile des Petrels, Antarctica.

Frederique Olivier / Time lapse of the Aurora Australis, Antarctica.

Frederique Olivier / Time lapse of the Aurora Australis, Antarctica.

Frederique Olivier / Timelapse of the Aurora Australis, Antarctica.

Frederique Olivier / Sundog / Parhelion (circle of light around the sun) seen from the back of icebreaker 'Aurora Australis' near Mawson Station, Antarctica, February 2011.

Fraser Gunn / Night sky and southern lights over Lake Tekapo and village, Mackenzie Country, New Zealand

Fraser Gunn / Southern lights and Mt John Observatory, New Zealand

Frederique Olivier / Emperor penguins {Aptenodytes forsteri} huddled together for warmth at night under sky with display of Southern lights, Aurora australis, Antarctica. NOT FOR REPRODUCTION BIGGER THAN A4.

Frederique Olivier / Southern lights, Aurora australis, in the night sky, above camp tent, Antarctica. NOT FOR REPRODUCTION GREATER THAN A4 SIZE