![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
![The Gran Telescopio Canarias discovers the largest cluster of galaxies known in the early universe | Instituto de Astrofísica de Canarias • IAC The Gran Telescopio Canarias discovers the largest cluster of galaxies known in the early universe | Instituto de Astrofísica de Canarias • IAC](https://www.iac.es/sites/default/files/images/inline-images/GTC%20puesta%201.jpg)
The Gran Telescopio Canarias discovers the largest cluster of galaxies known in the early universe | Instituto de Astrofísica de Canarias • IAC
![Gran Telescopio Canarias European Northern Obseratory,Grand Telescope,La Palma,Canary Islands,Spain,GTC telescope Stock Photo - Alamy Gran Telescopio Canarias European Northern Obseratory,Grand Telescope,La Palma,Canary Islands,Spain,GTC telescope Stock Photo - Alamy](https://c8.alamy.com/comp/B8X6R9/gran-telescopio-canarias-european-northern-obseratorygrand-telescopela-B8X6R9.jpg)
Gran Telescopio Canarias European Northern Obseratory,Grand Telescope,La Palma,Canary Islands,Spain,GTC telescope Stock Photo - Alamy
![The Gran Telescopio Canarias is participating in a programme to monitor potentially dangerous asteroids | Instituto de Astrofísica de Canarias • IAC The Gran Telescopio Canarias is participating in a programme to monitor potentially dangerous asteroids | Instituto de Astrofísica de Canarias • IAC](https://www.iac.es/sites/default/files/styles/color/public/images/news/GTCSunset_DanielLopez.jpg?itok=steuDVEU)