Widdekind Posted August 9, 2010 Share Posted August 9, 2010 Consider the classical cartoon, describing entropy -- a state where all the molecules of gas, confined to a box, happen to occupy only half of that available volume, is said to have "lower entropy", than a state where the same molecules are spread out more evenly. Now, make that "box" into the whole cosmos. And, make "half the box" into the gravitationally condensed over-densities, associated with Large Scale Structure. By "ordering" the matter, which was once spread out evenly across the cosmos (at the Big Bang), into Galaxies, Clusters, Super-Clusters, and the Cosmic Web, does gravity reduce the entropy of the cosmos ??? Link to comment Share on other sites More sharing options...
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