Last updated on April 16, 2014 at 21:24 EDT
Aurora in Kangerlussuaq
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Aurora in Kangerlussuaq

April 8, 2013
Lights of an aurora seen in Kangerlussuaq, Greenland, during NASA's Operation IceBridge campaign. Auroras are natural light displays seen at high latitudes caused when charged particles from the sun collide with Earth's upper atmosphere. Credit: NASA / John Sonntag