ALMA (ESO / NAOJ / NRAO), W. GARNIER / EUROPEAN SOUTHERN OBSERVATORY / SCIENCE PHOTO LIBRARY ALMA (ESO / NAOJ / NRAO), W. GARNIER / EUROPEAN SOUTHERN OBSERVATORY / SCIENCE PHOTO LIBRARY
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ALMA Operations Support Facility (OSF), aerial photograph. ALMA (Atacama Large Millimeter/sub-millimeter Array) is an array of 66 radio antennas prepared here at an elevation of 2900 metres and then moved to an elevation of 5000 metres on the nearby arid Chajnantor plateau. The main OSF building is at centre. Behind this are the antenna integration areas, from left to right: European, Japanese and North American. Data from the separate antennas is combined by interferometry, making it one of the most powerful telescopes in the world. Observations began in late 2011. Photograph published in July 2011.
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