Feeling green

The Atacama Large Millimeter/submillimeter Array (ALMA) is situated more than 5000 metres above sea level in the Chilean desert, on the Chajnantor plateau. Here, the dry air and thin atmosphere allow a spectacular view into the Universe and make it the perfect place for such a sensitive telescope. An artificial green glow illuminates one of ALMA's 66 antennas, as it observes the Milky Way above.