Liz, Close but not quite correct. It's not a matter of whether the universe is isotropic or homogeneous that's important, its what its local mass energy content is that determines whether that locality expands with the Hubble expansion or not.
If some locality of the universe is isotropic and homogeneous, but contains significant mass-energy, it will NOT "expand at all scales above atoms" as you mistakenly suggest.... ' Edgar On Thursday, January 23, 2014 5:33:38 AM UTC-5, Liz R wrote: > > p718 of Gravitation is concerned with the expansion factor of the > universe, and points out that it is only applicable above the scale of > galactic clusters, which is to say the scale at which things aren't > gravitationally bound. If I read it aright, it appears to be showing that > in an isotropic and homogeneous universe, the expansion will be uniform - > probably at all scales (above atoms) in the limiting case of a perfectly > smooth gas, otherwise at the scale at which the universe can be considered > homogeneous. > > > On 22 January 2014 10:02, Edgar L. Owen <edga...@att.net <javascript:>>wrote: > >> Spud, >> >> We could always ask Kip Thorne who is a of course a leading authority on >> gravitation to judge. I'm just repeating what his book says. >> >> If anyone has the book Gravitation, Misner, Thorne and Wheeler explain >> this on page 718. >> >> I also ran this dark matter theory by Leonard Susskind a couple years >> back and he said it was certainly a possibility.. >> >> -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything-list@googlegroups.com. Visit this group at http://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/groups/opt_out.
