The dome and skeleton of the ESO Extremely Large Telescope. Source: ESO/G.Vecchia The Extremely Large Telescope (ELT) of the European Southern Observatory (ESO), which is designed to observe ...
A mirror is seen at the site where European Southern Observatory (ESO) is constructing the world's largest optical telescope atop a mountain in Chile's arid Atacama desert, in Chile, January 26, 2025.