Is space cold or hot??

Is space cold or hot??

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    Space (empty space -- vacuum) has no "hot" or "cold" because those are defined by molecular motion, and there aren't any molecules to move. If there was no solar radiation in space, the thermal energy of any object there would be radiated away as infra-red radiation.

    The Earth radiates away almost exactly the same amount of heat (averaged across the 24-hour day) as it receives from the Sun.

    So, if the Sun wasn't there heating the Earth, the Earth would radiate all its heat into space -- it would take centuries or more, but the Earth would cool, not by conduction or convection, but by radiation.

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  • 9 years ago

    Matter reacts to degrees of space otherwise empty space is neither hot or cold,

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  • 9 years ago

    Empty space is very cold, only 3 degrees above absolute zero; unless in the local region of a star or planetary body.

    Source(s): Wikipedia
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  • 9 years ago

    It depends on where you are. If you are close to a star, it would be hot. If you are far away from a star, it would be cold.

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  • Anonymous
    9 years ago

    cold

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  • 9 years ago

    cold

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  • 9 years ago

    Except for the "life zone" around certain individual stars, space is colder than you could ever imagine.

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  • Anonymous
    9 years ago

    cold..

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  • Anonymous
    9 years ago

    cold as ***

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