ESO is the foremost intergovernmental astronomy organisation in Europe and the world's most productive astronomical observatory. It operates three sites in Chile — La Silla, Paranal and Chajnantor — on behalf of its fifteen member states. It builds ALMA together with international partners, and designs the European Extremely Large Telescope.
ESO, the European Southern Observatory, builds and operates a suite of the world's most advanced ground-based astronomical telescopes
