![Gran Telescopio Canarias, Astronomical Telescope at Roque de los Muchachos Observatory, La Palma Island, Canaries, Spain Stock Photo - Alamy Gran Telescopio Canarias, Astronomical Telescope at Roque de los Muchachos Observatory, La Palma Island, Canaries, Spain Stock Photo - Alamy](https://c8.alamy.com/comp/W2DP19/gran-telescopio-canarias-astronomical-telescope-at-roque-de-los-muchachos-observatory-la-palma-island-canaries-spain-W2DP19.jpg)
Gran Telescopio Canarias, Astronomical Telescope at Roque de los Muchachos Observatory, La Palma Island, Canaries, Spain Stock Photo - Alamy
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Gran Telescopio Canarias European Northern Obseratory,Grand Telescope,La Palma,Canary Islands,Spain,GTC telescope Stock Photo - Alamy
![Sharon Backhouse on Twitter: "The world's largest telescope has been closed for 22 days (Gran Telescopio Canarias (GTC): “the ash from the La Palma volcano is "like blades" that could damage the Sharon Backhouse on Twitter: "The world's largest telescope has been closed for 22 days (Gran Telescopio Canarias (GTC): “the ash from the La Palma volcano is "like blades" that could damage the](https://pbs.twimg.com/media/FBzbC6ZWQAM3O-_.jpg)