Tuesday, October 14, 2008

Polar Lights

Auroras are natural light displays in the sky, usually observed at night, particularly in the polar zone. They typically occur in the ionosphere. The aurora borealis is also called the northern polar lights, as it is only visible in the sky from the Northern Hemisphere. The aurora borealis most often occurs from September to October and from March to April. This was taken in Oxararfoss in Iceland.

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