On 1/25/2025 6:56 PM, Alan Grayson wrote:
*
*
*Yes. I don't think I ever made a theoretical argument; just an
empirical one that the universe was never spatially infinite, now or
in the past. *
There's no empirical argument for that because the universe looks flat,
which is empirically consistent with it being spatially infinite. Now
you may object to that on some philosophical or metaphysical grounds and
just say it is very, very big compared to the part we can see and hence
looks flat (as the Earth looks flat locally).
*Cosmologists agree that the universe gets smaller as we go backward
in time. How could it get smaller as it returns to the BB, and yet
still be infinite in spatial extent? *
It could have been always spacially infinite.
Brent
*Much more plausible is that it was never infinite in spatial extent.
If GR assumes an infinite universe at T=0, on what principle was that
assumed? Off hand it seems gratuitous. AG *
--
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 view this discussion visit
https://groups.google.com/d/msgid/everything-list/ddf8b0fc-e77c-4010-b4ff-55ecbcce8807%40gmail.com.
