Titled "The North Celestial Tree" this picture was composed over a period of nearly 2 hours as a series of 30 second long, consecutive exposures on October 5th. These exposures were done with a digital camera on a tripod in Southern Spain. The picture aims to reflect Earth's rotation around its axis which leads to the center of concentric arcs in the night sky and a seriously great picture, in my opinion.
http://apod.nasa.gov/apod/ap131023.html

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