On Saturday, May 31, 2025 at 9:48:27 AM UTC-6 John Clark wrote:
On Sat, May 31, 2025 at 11:27 AM Alan Grayson <agrays...@gmail.com> wrote: *>> NO. Until the late 1990s everybody, including Edwin Hubble, figured that the expansion of the universe must be slowing down due to gravity's attraction, but then we discovered the expansion is actually accelerating, and nobody knows why. So the universe is expanding faster now than it was 10 billion years ago.* *> I am aware of that. Does it mean Hubble's law is wrong.* *Yes. As originally stated Hubble's law didn't take the acceleration of the universe into account. For nearby galaxies, those only a billion or two light years away, that discrepancy isn't significant, but for more distant objects it is. * *I think you mean that taking the acceleration of the universe into account, Hubble's law departs from linearity, while distant galaxies are still receding at ever increasing speeds, where the latter result is purely a consequence of geometry. Correct? AG * *> It says, if I understand correctly, that the further back in time we go, the greater is the rate of expansion? AG* *NO. The universe is accelerating so the further back in time we go, the LESS is the rate of expansion, and in the future it will be expanding even faster.* *Why will the universe keep expanding into the future? I don't think that's a given based on what we know. AG * *John K Clark See what's on my new list at Extropolis <https://groups.google.com/g/extropolis>* -- 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/9ae3e765-4c54-4dc1-af66-e816092849fen%40googlegroups.com.
