Rotating the New Extremely Large Telescope | European Southern Observatory
This video shows how, for the first time, the structure of the European Southern Observatory's Extremely Large Telescope (ELT) in Chile as it was rotated around its vertical axis. ESO staff at the construction site, together with Ace/Cimolai’s team leading the construction of the dome and main structure, rotated the telescope first by hand by a few centimeters, and then a full rotation using auxiliary motors. While this may seem small, the entire structure currently weighs around 2500 tonnes. This will further increase up to 4600 tonnes once the mirrors and science instruments are installed. The structure rests on a layer of oil just 80 microns thin that allows the telescope to rotate smoothly. Testing this motion is thus key to ensure that this massive telescope can point at all areas of the southern sky.
Discover more about ESO’s ELT at: https://elt.eso.org/
Inside the dome, the construction of the main structure of what will be the world's largest optical and near-infrared telescope is very advanced. With the first light planned for the end of the decade, the ELT and its groundbreaking 39-meter main mirror will tackle major challenges in astronomy and, ultimately, help us understand our place in the Universe.
Learn more about the ELT: https://elt.eso.org
Chile, officially the Republic of Chile, is a country in western South America. It is the southernmost country in the world and the closest to Antarctica, extending along a narrow strip of land between the Andes Mountains and the Pacific Ocean.
Editing: Martin Wallner
Written by: Bárbara Ferreira
Footage: Apical, Jose Porte/Chepox, Alejandro Ubilla/Chepox
Acknowledgements: Cimolai
Duration: 1 minute
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