![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/styles/color/public/images/news/HST%20RGB%20850%20775%20606%20TIFF%20MARCAS%20OK.jpg?itok=wqD9IRsy)
The Gran Telescopio Canarias discovers the largest cluster of galaxies known in the early universe | Instituto de Astrofísica de Canarias • IAC
![10 years of the GTC: Amazing science with an astonishing telescope | Instituto de Astrofísica de Canarias • IAC 10 years of the GTC: Amazing science with an astonishing telescope | Instituto de Astrofísica de Canarias • IAC](https://www.iac.es/sites/default/files/images/news/folleto_gtc_10_aniv.jpg)
10 years of the GTC: Amazing science with an astonishing telescope | Instituto de Astrofísica de Canarias • IAC
![Largest optical reflecting telescope Gran Telescopio Canarias located on grassy hilltop against cloudy sky at astronomical observatory on island of La Stock Photo - Alamy Largest optical reflecting telescope Gran Telescopio Canarias located on grassy hilltop against cloudy sky at astronomical observatory on island of La Stock Photo - Alamy](https://c8.alamy.com/comp/2DA0NC1/largest-optical-reflecting-telescope-gran-telescopio-canarias-located-on-grassy-hilltop-against-cloudy-sky-at-astronomical-observatory-on-island-of-la-2DA0NC1.jpg)
Largest optical reflecting telescope Gran Telescopio Canarias located on grassy hilltop against cloudy sky at astronomical observatory on island of La Stock Photo - Alamy
![The Gran Telescopio Canarias, also known as GranTeCan or GTC, is a 10.4 m (410 in) reflecting telescope undertaking commissioning observations at the Roque de los Muchachos Observatory on the island of The Gran Telescopio Canarias, also known as GranTeCan or GTC, is a 10.4 m (410 in) reflecting telescope undertaking commissioning observations at the Roque de los Muchachos Observatory on the island of](http://ppcdn.500px.org/53370764/21cdca93b12c7f1e56d63ea4c942589e0d23c436/5.jpg)
The Gran Telescopio Canarias, also known as GranTeCan or GTC, is a 10.4 m (410 in) reflecting telescope undertaking commissioning observations at the Roque de los Muchachos Observatory on the island of
![10 years of the GTC: Amazing science with an astonishing telescope | Instituto de Astrofísica de Canarias • IAC 10 years of the GTC: Amazing science with an astonishing telescope | Instituto de Astrofísica de Canarias • IAC](https://www.iac.es/sites/default/files/styles/crop_rectangle_21x9_to_1280/public/images/news/folleto_gtc_10_aniv.jpg?h=fb815367&itok=DQTojVIl)