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What are the coldest places in the solar system?

Doug Kaupa, Beavercreek, Ohio
Location  
Coldest temperature  
Date measured  
 Triton
 38K (–235° C, –391° F)
 1989
 (Voyager 2)
 Pluto
 37 K (–236° C, –393° F)
 2005-2010
 (Submillimeter Array)
 Eris
 <36 K (–237° C, –395° F)
 2011
 (Institute for Radio Astronomy
 at Millimeter wavelengths)
 Moon (craters
 near pole)
 25 K (–248° C, –415° F)
 2010
 (Lunar Reconnaissance Orbiter)
 Interstellar
 space
 2.73 K (–270° C, –455° F)
 2000
 (BOOMERanG)

Key: K = Kelvin; C = Celsius; F = Fahrenheit

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