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C.D. Olsen adjusts the image on his replica of a kew photoheliograph camera as it displays an image of the sun on the campus of Southern Illinois University before the start of a total solar eclipse in Carbondale, Illinois, USA, 21 August 2017. The 21 August 2017 total solar eclipse will last a maximum of 2 minutes 43 seconds and the thin path of totality will pass through portions of 14 US states, according to the National Aeronautics and Space Administration (NASA). (Photo by Tannen Maury/EPA)
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