On Monday, January 13, 2020 at 5:39:47 AM UTC-7, John Clark wrote: > > On Mon, Jan 13, 2020 at 5:10 AM Alan Grayson <[email protected] > <javascript:>> wrote: > > *> if our bubble has a finite age and is expanding, it must be finite in >> spatial extent since the expansion rate is finite.* > > > Space would not have to expand infinitely fast just faster than light, and > that is allowed under General Relativity, in fact that is exactly what > Inflation hypothesizes. If that is indeed the case then no matter how fast > 2 particles are moving away from each other they can keep getting further > and further apart forever and never meet each other again. And that's what > a universe with infinite spatial extent means. > > John K Clark >
*Due to the expansion of the universe, distant galaxies will eventually wink-out as they enter the non-observable region. This is a purely geometric effect of expansion, and will occur whether the rate is faster than the SoL or not. Moreover, infinite spatial extent means that a beam of light will never return to its starting point, as it would for a spherical surface. For a flat surface, a beam in any direction never returns to its starting point. THIS is what infinite spatial extent MEANS., not what your wrote above. 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/a92be6f6-6b4d-442d-bff0-e02cc464fef5%40googlegroups.com.
