[ExI] Could the Universe Be Finite?

[Keith Henson]

On Sat, Dec 16, 2023 at 11:03 AM Jason Resch via extropy-chat
<extropy-chat at lists.extropy.org> wrote:
>
> On Sat, Dec 16, 2023 at 1:51 PM Keith Henson <hkeithhenson at gmail.com> wrote:
>>
>> Finite or infinite, I can't see any practical application
>
> Perhaps there are no applications, but there are implications of living in an infinite reality:

If what we are seeing at Tabby's Star is alien data centers 400 times
the area of the Earth, then chances are we will not live in the base
reality.  It's really weird.  The physical constraints on these things
include orbital mechanics, energy/thermal balance and I think most
importantly the size of the structures is limited by the speed of
light.

A lot of these subjects such as uploading and computing in space using
solar energy were discussed on the early extropian list.  But I never
expected to see an example.

Keith

Keith

> https://alwaysasking.com/how-big-is-the-universe/#Implications_of_an_Infinite_Reality
> https://alwaysasking.com/why-does-anything-exist/#Implications
>
>
> Jason
>
>>
>>
>> Keith
>>
>> On Sat, Dec 16, 2023 at 8:45 AM Jason Resch via extropy-chat
>> <extropy-chat at lists.extropy.org> wrote:
>> >
>> >
>> >
>> > On Sat, Dec 16, 2023, 6:41 AM BillK via extropy-chat <extropy-chat at lists.extropy.org> wrote:
>> >>
>> >> It’s not absurd to think the universe might have an edge.
>> >> By Eric Schwitzgebel & Jacob Barandes    December 15, 2023
>> >>
>> >> On recent estimates, the observable universe—the portion of the
>> >> universe that we can detect through our telescopes—extends about 47
>> >> billion light-years in every direction. But the limit of what we can
>> >> see is one thing, and the limit of what exists is quite another.
>> >>
>> >> <https://nautil.us/could-the-universe-be-finite-466593/>
>> >> Quote:
>> >> Leading cosmologists, including Alex Vilenkin, Max Tegmark, and Andrei
>> >> Linde, have argued that spatial infinitude is the natural consequence
>> >> of the best current theories of cosmic inflation. Given that, plus the
>> >> absence of evidence for an edge or closed topology, infinitude seems a
>> >> reasonable default view. The mere 47 billion light-years we can see is
>> >> the tiniest speck of a smidgen of a drop in an endless expanse.
>> >
>> >
>> > Here is a good explanation of how the universe can be spatially infinite when seen from inside a finite bubble created by inflation:
>> >
>> > https://youtu.be/rfeJhzPq3jQ
>> >
>> > Jason
>> >
>> >
>> >> --------------
>> >>
>> >> BillK
>> >>
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