![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 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/DEJBN7/the-gran-telescopio-canarias-gtc-roque-de-los-muchachos-observatory-DEJBN7.jpg)
The Gran Telescopio CANARIAS GTC, Roque de los Muchachos Observatory, La Palma, Canary Islands, Spain The Gran Telescopio Stock Photo - Alamy
![Canary Islands Selected as Alternative Spot for the Thirty Meter Telescope | Smart News| Smithsonian Magazine Canary Islands Selected as Alternative Spot for the Thirty Meter Telescope | Smart News| Smithsonian Magazine](https://th-thumbnailer.cdn-si-edu.com/fRREVSUcrXP26NlgeYV3rAp7CRo=/fit-in/1600x0/https://tf-cmsv2-smithsonianmag-media.s3.amazonaws.com/filer/cb/5b/cb5b566e-929f-485c-b80c-747edd74f3f9/screen_shot_2016-11-01_at_25919_pm.png)