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Astronomers to Provide Free Telescope Viewing at Grand Canyon National Park, June 9-16 - Grand Canyon National Park (U.S. National Park Service)
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File:Grand Canyon National Park, 23 Annual Star Party 2013 - 6204 - Flickr - Grand Canyon NPS.jpg - Wikimedia Commons
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Gran Telescopio Canarias, Astronomical Telescope at Roque de los Muchachos Observatory, La Palma Island, Canaries, Spain Stock Photo - Alamy
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