urn:nasa:pds:context:facility:observatory.eso-chajnantor 1.2 1.22.0.0 Product_Context 2026-07-07 1.2 Removed duplicate Internal_Reference entries from Reference_List. 2025-01-07 1.1 Updated schema version. Adding missing "instrument" references. Adding missing "telescope" references. 2022-02-24 1.0 Initial urn:nasa:pds:context:telescope:eso-chajnantor.alma facility_to_telescope urn:nasa:pds:context:instrument:eso-chajnantor.alma.alma_radio_receiver facility_to_instrument European Southern Observatory - Chajnantor Observatory

APEX Chajnantor Site II Región Chile

Chile European Southern Observatory - Chajnantor, located in the Chilean Andes, hosts the ALMA (Atacama Large Millimeter/submillimeter Array), one of the most powerful astronomical instruments for studying the cold universe, including star formation, galaxies, and the interstellar medium.