Open Sesame!
The doors of our Extremely Large Telescope have moved for the first time. This was no small feat, as each door will weigh 650 tonnes once completed.
The ELT dome and its doors will guard the telescope from the harsh conditions of the Atacama Desert in #Chile.
https://www.eso.org/public/videos/potw2544a/
馃摴 ESO/ACe
#astrodon #astronomy #astrophysics #space #science #engineering