NRAO ALMA Explorer Learn and Explore NSF AUI
Visit ALMA and its Chilean environs with exclusive narrated and hosted video tours.
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ALMA in Action

The 66 antennas of ALMA work together as one giant telescope to view the skies over northern Chile. They have mapped the places where stars and planets are being born. Their mounts move as fast as missile trackers to allow the antennas to make quick calibration observations off their target sources to measure the amount of water in the atmosphere that might affect their view.