![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)
The Gran Telescopio CANARIAS GTC, Roque de los Muchachos Observatory, La Palma, Canary Islands, Spain The Gran Telescopio 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)
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
![El Gran Telescopio Canarias y el potencial de la ingeniería española | Fundación Consejo España Brasil El Gran Telescopio Canarias y el potencial de la ingeniería española | Fundación Consejo España Brasil](http://www.espanha-brasil.org/gra/img/articulos/2018/06/19/DSC_1387.jpg)
El Gran Telescopio Canarias y el potencial de la ingeniería española | Fundación Consejo España Brasil
![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
![The Gran Telescopio CANARIAS GTC, Roque de los Muchachos Observatory, La Palma, Canary Islands, Stock Photo, Picture And Rights Managed Image. Pic. B20-1736363 | agefotostock The Gran Telescopio CANARIAS GTC, Roque de los Muchachos Observatory, La Palma, Canary Islands, Stock Photo, Picture And Rights Managed Image. Pic. B20-1736363 | agefotostock](https://previews.agefotostock.com/previewimage/medibigoff/92a70eafe717822ba2ea4301ce5c6a02/b20-1736363.jpg)