On Saturday, February 8, 2025 at 2:25:00 PM UTC-7 John Clark wrote:
As I said, before, Penrose Theorem assumes that there is no significance What do you mean by no significance? As for my speculation at T=0, it's hard to imagine galaxies becoming progressively less distant from each other as we go back in time, and then suddenly at T=0, spreading out in spatially infinite directions. That's what must happen in a universe of finite age which become spatially infinite at T=0. OTOH, if all mass and energy converges to zero volume at T=0, it's conceivable, via the Singularity Theorem, for a BH to form. AG Outside of the event, Horizon and that would not be true if the universe was infinite So the theorem Does not apply. On Sat, Feb 8, 2025 at 2:56 PM Alan Grayson <[email protected]> wrote: On Saturday, February 8, 2025 at 12:08:24 PM UTC-7 John Clark wrote: On Sat, Feb 8, 2025 at 9:23 AM Alan Grayson <[email protected]> wrote: > If we run the clock backward in time, the universe becomes progressively denser as the average distance between galaxies decreases. So if it becomes a BH, it seems highly unlikely it started out infinite in spatial extent, which is what you and Brent conjectured. *It doesn't become a black hole of the universe is infinite. Equations for the formation of a black hole assume that there is no significant amount of matter outside the event horizon. * That's an assumption. Never forget what's assumed! AG *John K Clark See what's on my new list at Extropolis <https://groups.google.com/g/extropolis>* You agreed that since the universe has a finite age, if it's infinite in spatial extent, that would necessarily have occurred at its origin. But although Penrose's theorem suggests it started as a BH, we can be relieved of that illusion based on our extensive knowledge of the interior and behavior of BH's. 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 visit https://groups.google.com/d/msgid/everything-list/1f294e36-8da3-409b-9684-8f084d736588n%40googlegroups.com.
