![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)
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
![Gran Telescopio Canarias [Instituto de Astrofísica de Canarias ](ES) sited on a volcanic peak 2,267 metres (7,438 ft) above sea level. | sciencesprings Gran Telescopio Canarias [Instituto de Astrofísica de Canarias ](ES) sited on a volcanic peak 2,267 metres (7,438 ft) above sea level. | sciencesprings](https://sciencesprings.files.wordpress.com/2018/09/1e1d7-telescopio_gran_canaria.jpg?w=624)
Gran Telescopio Canarias [Instituto de Astrofísica de Canarias ](ES) sited on a volcanic peak 2,267 metres (7,438 ft) above sea level. | sciencesprings
Outside / inside view of the Gran Telescopio CANARIAS (GTC). Credits:... | Download Scientific Diagram
![The Gran Telescopio CANARIAS GTC, Roque de los Muchachos Observatory, La Palma, Canary Islands, Spain The Gran Telescopio Stock Photo - Alamy The Gran Telescopio CANARIAS GTC, Roque de los Muchachos Observatory, La Palma, Canary Islands, Spain The Gran Telescopio Stock Photo - Alamy](https://c8.alamy.com/comp/DEJBNG/the-gran-telescopio-canarias-gtc-roque-de-los-muchachos-observatory-DEJBNG.jpg)