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Subject What temperature is outer space? Is it hot or cold?

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Original Message What temperature is outer space? Is it hot or cold?

temperature: the degree or intensity of heat present in a substance or object, especially as expressed according to a comparative scale and shown by a thermometer or perceived by touch.

The answer is that space is empty, there is nothing there. Space isn't a substance or object, so it doesn't have a temperature. If you stick a thermometer into space, the reading won't change because there is nothing in space to make the thermometer reading change.

Except that near stars, space is full of radiation. So if you put a thermometer into space near a star, radiation will hit the thermometer and heat it up.

So space isn't cold, near a star, something in space will get heated up by radiation.

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