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Milky Way over Cerro Tololo observatory. Milky Way, Southern Cross and Alpha & Beta Centauri in the night sky over the telescope domes of the Cerro Tololo Inter-American Observatory (CTIO) near La Serena, Chile. The CTIO consists of the Yale 1 metre telescope, Curtis- Schmidt telescope, 4 metre Victor Blanco telescope, 1.5 metre Ritchey-Chretien telescope and 0.9 metre telescope. (KEYSTONE/SCIENCE PHOTO LIBRARY/BABAK TAFRESHI/SCIENCE PHOTO LIBRARY)