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Largest optical reflecting telescope Gran Telescopio Canarias located on grassy hilltop against cloudy sky at astronomical
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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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The Gran Telescopio CANARIAS GTC, Roque de los Muchachos Observatory, La Palma, Canary Islands, Spain The Gran Telescopio Stock Photo - Alamy
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