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Zeroth Law of Thermodynamics

  1. Oct 14, 2008 #1
    Is there a set average temperature for the universe? And taking into consideration our habitable temperature is x being closer to y than z. If so where does zeroth law of thermodynamics fit?

    x='s earths surface average temperature
    y='s absolute zero
    z='s surface of the sun

    What percentage of the universe would be habitable solely based on temperature.

    A link will do, I've been trolling around thermodynamic web forums and the like...

    Last edited: Oct 14, 2008
  2. jcsd
  3. Oct 14, 2008 #2


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    Gold Member

    Well, 4K is a pretty good answer.

    By "habitable" I will assume "life as we know it". If you wish to change that, you'll need to be more specific.

    And with that assumption, the answer is easy: the liquid range of water: 273K-373K. This is is known as the http://en.wikipedia.org/wiki/Goldilocks_zone#Goldilocks_phenomenon".

    But I'm not sure those are the answers you were looking for...
    Last edited by a moderator: Apr 23, 2017
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