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Milky Way over ALMA telescopes. Arm of the Milky Way over the ALMA (Atacama Large Millimetre/sub-millimetre Array) telescope array in the Atacama Desert, Chile. ALMA is an array of 66 radio antennae located at an elevation of 5000 metres on the arid Chajnantor plateau of the Atacama Desert in the Chilean Andes. Here, the Carina Nebula and the Southern Cross (Crux) can be seen next to the Coalsack Dark Nebula (top). (KEYSTONE/SCIENCE PHOTO LIBRARY/BABAK TAFRESHI, TWAN/SCIENCE PHOTO LIBRARY)