Yes, I’m assuming spatial expansion, not just increasing galactic distances. The observable horizon expands because the Hubble rate evolves over time. While some distant galaxies are receding faster than light, the expansion rate is not constant, allowing light from previously unobservable regions to eventually reach us. This is why our observable universe continues to grow.
As for black holes, when they eject material, it comes from the accretion disk, not the interior. Excess inflowing matter, under extreme magnetic fields and radiation pressure, is expelled before crossing the event horizon. Once inside, nothing escapes. Quentin All those moments will be lost in time, like tears in rain. (Roy Batty/Rutger Hauer) Le mar. 18 mars 2025, 16:54, Alan Grayson <agrayson2...@gmail.com> a écrit : > > > On Monday, March 17, 2025 at 5:03:42 PM UTC-6 Quentin Anciaux wrote: > > I have been reflecting on the idea that our universe could be the interior > of a giant black hole, but several fundamental questions arise. > > How can this account for the apparent flatness of the universe, given that > a black hole’s interior should exhibit strong curvature? Observations > indicate that our universe is nearly flat, yet this hypothesis lacks a > clear mechanism to explain why. > > If we are inside a black hole, where is the boundary? A black hole's > internal space-time is inherently limited by the event horizon, yet our > observable universe does not show any indication of such a constraint. How > does this model reconcile the absence of an observable edge? > > Furthermore, in classical black hole physics, the event horizon expands > only when additional mass or energy is absorbed. In contrast, our > universe’s observable horizon grows over time without any apparent external > input. What mechanism would drive this expansion in a black hole framework? > > These points suggest that such a model would require an unconventional and > exotic space-time structure beyond classical general relativity. I would > appreciate any insights on how these issues could be addressed. > > Quentin > > All those moments will be lost in time, like tears in rain. (Roy > Batty/Rutger Hauer) > > > When you refer to the horizon expanding of the observable universe, are > you now assuming the universe is expanding spatially, rather than just the > average galactic distances increasing? BTW, I'm confused about how that > horizon increases spatially. Aren't the galaxies in the unobservable > regions receding faster than light speed, and this is the reason they're > unobservable for us? If so, how can the observable region increase so some > of them become part of the observable region? One other thing; I viewed a > video showing BH's releasing material when too much is inflowing. Is some > of this material from the interior, or is all of it inflowing material that > is rejected? 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/8dae27a3-81f7-4ce2-a799-672183fae78bn%40googlegroups.com > <https://groups.google.com/d/msgid/everything-list/8dae27a3-81f7-4ce2-a799-672183fae78bn%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- 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/CAMW2kAq_1ChhLjzxaOu7Y%3DVR7jL5QmFwxECcs63o88Ot042MQA%40mail.gmail.com.
