ALAN DYER / VISUALS UNLIMITED, INC. / SCIENCE PHOTO LIBRARY ALAN DYER / VISUALS UNLIMITED, INC. / SCIENCE PHOTO LIBRARY
Four planets rising over the Andes Mountains just before dawn, May 2, 2011. The planets from top to bottom are Venus, Mercury, Jupiter, and Mars. The conical volcano at left is Licancabur, a peak with an altitude of 19,400 feet or 5900 meters, San Pedro de Atacama, Chile.
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