Moonrise above North American Antenna at ALMA’s high site

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Moonrise above North American Antenna at ALMA’s high site

Moonrise above North American Antenna at ALMA’s high site

Photo of the full moon above an ALMA radio antenna.

The final North American ALMA antenna, number 25 of 25, rests under a setting Moon after a day of testing at the Operations Support Facility in northern Chile. The North American antennas in the Atacama Large Millimeter/submillimeter Array (ALMA) can be distinguished through two details with the wiring: The wiring touches the edge of the antenna’s dish and has a pattern of triangles underneath it, as you can see in the above photograph.

Credit: NRAO/AUI/NSF

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