Entropy in an Expanding Universe

  title={Entropy in an Expanding Universe},
  author={Steven C. Frautschi},
  pages={593 - 599}
The question of how the observed evolution of organized structures from initial chaos in the expanding universe can be reconciled with the laws of statistical mechanics is studied, with emphasis on effects of the expansion and gravity. Some major sources of entropy increase are listed. An expanding "causal" region is defined in which the entropy, though increasing, tends to fall further and further behind its maximum possible value, thus allowing for the development of order. The related… 
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