ALMA Prototype Antennas
![Prototype ALMA antennas](https://public.nrao.edu/wp-content/uploads/2013/09/gallery-images-largeATFallthree_large.jpg)
At the Very Large Array site in New Mexico, the international partners in ALMA assembled and tested their 12-meter prototype antennas. From left to right: Japanese, North American, and European.
Credit: NRAO/AUI/NSF
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