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How cold is it in space?

Asked by Rickover (110points) March 8th, 2012

I know that in space, the average temperature is approximately 3 Kelvin. In movies, when somebody gets into space , the person freezes almost instantly. Does this happen in reality too? What I don’t understand is what kind of thermal contact is happening. What sucks all the heat, the few floating dust particles? It doesn’t seem legit.

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