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Milky Way over the Atacama Desert. Human (lower left) viewing the band of stars and nebulae making up the Milky Way in the sky over the Atacama Desert, Chile. This high-altitude desert, reaching elevations of over 2600 metres above sea level, provides excellent viewing conditions for astronomers. (KEYSTONE/SCIENCE PHOTO LIBRARY/JUAN CARLOS CASADO (starryearth.com) / SCIENCE PHOTO LIBRARY)