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ALMA Pinpoints Pluto

Explanation: The cold surface of Pluto and its largest moon Charon as seen with ALMA on July 15, 2014. Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) are making high-precision measurements of Pluto's location and orbit around the Sun to help NASA's New Horizons spacecraft accurately home in on its target when it nears Pluto and its five known moons in July 2015.

Image credit: NRAO/AUI/NSF.