Light from 9 giga·years ago had to climb out of deeper gravity wells.
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From: JeffRelf.F-M.FM on 28 Jun 2010 18:18 <PRE> Light from 9 giga·years ago had to climb out of deeper gravity wells, so it's more red·shifted. As you go back farther in time, by giga·years, the universe is more and more dense, less dissipated, less “spent”, more predictable. Once <A hRef="http://en.wikipedia.org/wiki/Exergy">eXergy</A> is spent, that's it, it NEVER COMES BACK. |