July – The crescent Moon over an ALMA antenna

At sunset, a gentle crescent Moon kisses the twilight over Chile’s Chajnantor plateau, home of the Atacama Large Millimeter/submillimeter Array (ALMA). The silhouette of one of ALMA’s 66 antennas stands beneath the elegant layered clouds, clothed in red pastel shades. Thanks to a phenomenon called earthshine, the entire disc of the Moon can be seen shining in light reflected off the Earth. The ALMA Observatory is run by an international partnership: on behalf of Europe by ESO; on behalf of North America by the National Radio Astronomy Observatory (NRAO); and on behalf of East Asia by the National Astronomical Observatory of Japan (NAOJ).


P. Horálek/ESO

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