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I How stuff in empty space cools down?

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  1. Jun 21, 2017 #1
    If a body have heat and floating in space do it loss heat?
    If it does loss heat and the how?
    Thanks!
     
  2. jcsd
  3. Jun 21, 2017 #2

    russ_watters

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    Radiation.
     
  4. Jun 21, 2017 #3
    I don't think it does. Heat loss requires something for the energy to transfer too.
     
  5. Jun 21, 2017 #4

    anorlunda

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    The light radiation streaming out in all directions carries energy away as @russ_watters said. Where the light goes to is irrelevant to the body.
     
  6. Jun 21, 2017 #5
    Face palm

    Forgot about light
     
  7. Jun 21, 2017 #6

    russ_watters

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    We can't forget about light(EM radiation) and still answer your question.
     
  8. Jun 21, 2017 #7
    I didn't ask a question. I said I forgot about Em when I replied. Completely slipped my mind. Did you mean his question?
     
  9. Jun 21, 2017 #8

    anorlunda

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    Actually there is one case where you can forget about light. Dark mattter.

    Dark matter does not emit light. Dark matter near a galaxy does not cool down, nor does it transfer heat to regular matter.

    But if the OP question is about ordinary matter rather than dark matter, the answer radiation stands.
     
  10. Jun 21, 2017 #9

    russ_watters

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    Sorry, misread forget for forgot and forgot who was who...
     
  11. Jun 21, 2017 #10
    No problem. My autocorrect changed Em to email. Just not my day, I think.
     
  12. Jun 21, 2017 #11
    Hah, totally what I meant.

    xD
     
  13. Jun 21, 2017 #12
    But where the light come from
     
  14. Jun 21, 2017 #13
    The more energy something has, the more photons it releases. Like fire, which is effectively really hot air, so hot it is red. Hence Red Hot.
     
  15. Jun 21, 2017 #14

    davenn

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    lets be really clear here
    anorlunda said ....

    light radiation --- probably not the best choice of words as to the unwary that may mean specifically visible light
    as @BL4CKB0X97 's response came back with

    Everything above 0K emits infrared radiation ... you, me, everything, but we sure don't radiate heat as visible light
    only when the object gets to a certain temperature will it start emitting visible light as well


    D
     
  16. Jun 21, 2017 #15

    anorlunda

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    Right @davenn . My choice of words was poor if the word "body" in the OP is a human body. But when I read it, I thought of a star as the body in space. @russ_watters one word answer "radiation" turns out to be most eloquent answer. :woot:
     
  17. Jun 21, 2017 #16

    Drakkith

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  18. Jun 21, 2017 #17

    davenn

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  19. Jun 21, 2017 #18

    Drakkith

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    I do what I can. :-p
     
  20. Jun 21, 2017 #19
    Well thank all of you for helping me now i understand and found what im looking for.
    Thank you verry much!!!
     
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