The universe is spatially flat and it always has been and it's infinite
spatially and always has been. It had an earliest state we know about
that was very dense and hot and things have expanded from that state.
Bren
On 10/3/2024 8:59 AM, Alan Grayson wrote:
On Thursday, October 3, 2024 at 9:50:12 AM UTC-6 Cosmin Visan wrote:
You can only ever observe yourself. So by unobservable you mean
the minds of other consciousnesses ?
I'm seeking substantive responses, so please refrain from posting on
this thread. AG
On Thursday 3 October 2024 at 17:21:28 UTC+3 Alan Grayson wrote:
To recapitulate and clarify the argument:
Firstly, by "universe" (our "bubble"), I mean the observable
*and* unobservable regions defining our expanding universe.
Secondly, since our universe is expanding, we could run the
clock backward to any earlier time, and imagine enclosing it
in a sphere, say, establishing that the observable region is
finite in spatial extent. (It's actually measured to have a
radius of 46 BLY.)
Thirdly, concerning the *un*observable region, let's assume
it's infinite in spatial extent. If so, this couldn't have
occurred in stages, say by spatial expansion, since no matter
how fast it might expand, or for how long a length of time, it
would remain finite throughout, and could never achieve
infinite status. Hence, the only way it could be infinite in
spatial extent, would be for it to be either *UN*-*created*,
or if it had a beginning it must have expanded
*instantaneously* to infinity in spatial extent. These options
are falsified in two ways; first by the CMBR, which is
predicted by the Big Bang. That is, empirical evidence affirms
it had a starting time. And second, as previously argued, if
it is now infinite in spatial extent and had a beginning, it
would have had to expand *instantaneously* to infinity. Since
I consider this physically impossible -- which is my unproven
and likely unprovable assumption -- by two lines of argument
our universe must be finite in spatial extent.
Final conclusions:, being *finite* in spatial extent, *it
cannot be flat* (despite the consensus view), since that
implies infinite in spatial extent (assuming it's not
toroidal). And there is no need to do any measurements. Using
a purely logical argument, our universe is finite in spatial
extent and cannot have a flat global geometry. Its likely
global geometry is approximately spherical, since it's
expanding in all directions from every point in spacetime and
is approximately isotropic. What could be *uncreated and
infinite in space and time*, is the substratum from which our
universe emerged.
QED, AG
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