Stock Photo - August 2018, Spain, La Palma: The Gran Telescopio Canarias (GTC) on the Roque de Los Muchachos. With a diameter of 10.4 meters, it has been the largest optical infrared mirror telescope in the world since 2007. Astro-tourism is becoming more and more popular on the Canary Island. Photo: Carola Frentzen/dpa. - Santa Cruz/Spain

Stock Photo: August 2018, Spain, La Palma: The Gran Telescopio Canarias (GTC) on the Roque de Los Muchachos. With a diameter of 10.4 meters.

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