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Temperature in space

  1. May 19, 2012 #1
    What is the temperature in space? For me temperature is a measure of how fast the moelcules of matter are moving - this is what i have read. If molecules have more kinetic energy they have higher temperature

    But space contains nothing so no temperature? Does it have absolute zero temeprature?
     
  2. jcsd
  3. May 20, 2012 #2

    haruspex

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    Space is nowhere a perfect vacuum. Even the voids between galaxy clusters contain several protons per cubic metre. That's enough to assign a temperature. 100,000K is common.
     
  4. May 20, 2012 #3
    Oh - didnt know that. What exactly is in space?
     
  5. May 20, 2012 #4

    tiny-tim

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  6. May 20, 2012 #5
    Thank you
     
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