On Mon, Jan 13, 2020 at 8:05 AM Alan Grayson <[email protected]> wrote:
* > **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.* I agree. And if inflation is correct and in the very early universe the distance between any 2 points expanded faster than light then they've moved beyond their observable horizon and once you've done that you can't go back, so even today a beam of light sent from one of those points can never reach the other. John K Clark > -- 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/CAJPayv2KHJGCiq_16HXPcMJDEpQmhAq_TUr1B-zDU-0ubsr2hQ%40mail.gmail.com.
