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Gravity versus Entropy

  1. Dec 27, 2008 #1
    From what I understand of the second law of thermodynamics, the tendency for overall entropy to increase is unstoppable; for entropy to decrease locally it must increase globally. But the force of gravity keeps matter throughout the cosmos in chunks, not uniformly spread out.

    My question is: Since temperature is a measure of atomic excitement, how can energy move towards a uniform distribution in places where there are no atoms? If gravity keeps matter in discrete chunks how can heat be evenly distributed where there is no matter to hold that heat?
  2. jcsd
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