2012年9月13日 星期四

aurora , Yukon, Canada. 極光

The aurora was due to the interaction of a coronal mass ejection (CME) from the sun with Earth's magnetosphere.
David Cartier, Sr.–Reuters/NASA
Pictures of the Week: August 31 – September 7 - LightBox http://lightbox.time.com/2012/09/07/pictures-of-the-week-august-31-september-7/#38
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