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Thu Sep 6, 2012 9:20am EDT

1 of 23. Swirls of green and red appear in an aurora over Whitehorse, Yukon on the night of September 3, 2012 in this NASA handout image. The aurora was due to the interaction of a coronal mass ejection (CME) from the sun with Earth's magnetosphere. The CME left the Sun on August 31 and arrived on September 3.

Credit: Reuters/Courtesy of David Cartier, Sr./NASA/Handout

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