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How cold is it in deep space?

Updated: 9/16/2023
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14y ago

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I believe it is about 3 degrees Kelvin. That is minus 270 degrees Celsius. This is known as the Cosmic Microwave Background Radiation(CMB) . Pensias and Wilson, using a radio telescope won the Nobel Prize for this finding and it gives us the best evidence yet of the remaining warmth left over from the Big Bang 13.8 Billion years ago.

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Q: How cold is it in deep space?
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