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A total of 126 images taken over the course of two hours make up this mosaic picture of Saturn. The Cassini-Huygens spacecraft snapped the photos on October 6, 2004, when it was approximately 3.9 million miles (6.3 million kilometers) from Saturn. Cassini was on a four-year mission to explore the ringed planet.
Photograph courtesy NASA/JPL/Space Science Institute

http://science.nationalgeographic.com/science/photos/saturn/saturn-mosaic.html