ESO Movie 25: APEX – The Atacama Pathfinder Experiment

APEX is a pathfinder for ALMA, the Atacama Large Millimetre/submillimetre Array, a revolutionary new telescope that ESO, together with its international partners, is now building on the Chajnantor plateau. APEX is based on a prototype antenna constructed for the ALMA project, and it will find many targets that ALMA will be able to study in great detail.

APEX is a collaboration between the Max Planck Institute for Radio Astronomy (MPIfR), the Onsala Space Observatory (OSO), and ESO. The telescope is operated by ESO.