Uploaded August 2024 | Updated September 2026, 2 weeks ago

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ESO’s Extremely Large Telescope (ELT) will boast the world’s largest telescope mirror ever, 39m across and weighing 200 tonnes. Check out this video to see engineers and constructions workers installing the massive steel structure that will support the mirror, inside the ELT dome in Chile’s Atacama Desert.

Learn more about ESO’s ELT at: elt.eso.org

Watch our ELT playlist here:   

 • ESO's Extremely Large Telescope  [LINK to youtube.com/playlist?list=PLSZ2Jv0bEZHy7el0mIrOMRKkhCw8pemaZ]

#ELT #BiggestEyeOnTheSky

Credit: ESO
Directed by: Angelos Tsaousis.
Editing: Angelos Tsaousis.
Web and technical support: Gurvan Bazin and Raquel Yumi Shida.
Written by: Bárbara Ferreira.
Footage and photos: ESO, Angelos Tsaousis, Martin Wallner, ACe/Cimolai.
Music: Jon Kennedy – Enchantica.