Uploaded October 2025 | Updated September 2026, 2 weeks ago
#TourESO
Discover the Paranal Observatory in our next virtual guided tour. Join us online, on Saturday, October 18th, from 16:00 CEST / 11:00hrs CLT. Make sure to watch us live, as the tour will not be available as a recording after the streaming. Streamed here on Facebook* and on our YouTube channel: orlo.uk/sdrfx *Visitors who open our Facebook ESO Astronomy page ahead of the starting time should refresh their browser when the tour starts.
#TourESO
Discover the Paranal Observatory in our next virtual guided tour. Join us online, on Saturday, October 18th, from 16:00 CEST / 11:00hrs CLT. Make sure to watch us live, as the tour will not be available as a recording after the streaming. Streamed here on Facebook* and on our YouTube channel: orlo.uk/sdrfx *Visitors who open our Facebook ESO Astronomy page ahead of the starting time should refresh their browser when the tour starts.










![World’s largest mirror support installed | ELT Updates
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: https://elt.eso.org/
Watch our ELT playlist here:
• ESOs Extremely Large Telescope [LINK to https://www.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. World’s largest mirror support installed | ELT Updates](https://i.ytimg.com/vi/rtz3PR5ge_0/mqdefault.jpg)