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From: Thomas Heger <ttt_heg@web.de>
Newsgroups: sci.physics.relativity
Subject: Re: does the universe exist beyond our horizon??
Date: Tue, 22 Oct 2024 21:08:37 +0200
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Am Montag000021, 21.10.2024 um 11:50 schrieb Mikko:
> On 2024-10-21 05:35:25 +0000, Thomas Heger said:
> 
>> Am Sonntag000020, 20.10.2024 um 11:14 schrieb Mikko:
>>> On 2024-10-19 19:03:34 +0000, kazu said:
>>>
>>>> essentially what i am asking is, is there something outside? or can 
>>>> there even be outside??
>>>
>>> The observable unverse looks like a small part of a larger, possibly
>>> infinite, universe.
>>>
>>>> is the universe like an egg and we are the yoke??
>>>
>>> As far as can be seen every part of the universe is similar to every
>>> other part. I small scale there are clusters and superclusters of
>>> galaxies but they seem to be evenly scattered. No shell, ho yoke-
>>>
>>
>> The universe 'folds into itself'.
> 
> That is not observed.

Sure, you cannot observe this.

But many real things are very hard to see.

E.g. radio-waves are real, but more or less invisible.

Also invisible is the other side of the globe, even if we know, that the 
'antipodes' do exist.

The content of a black hole is invisible, too, but should exist somehow.

IoW: invisble things can be real, even if we cannot observe them.

Therefore: observability is no requirement for realness.

> 
>> There is no 'outside' and no edge.
> 
> No 'outside' or edge has been observed but nither has been
> observed their non-existence.


The problem with the 'edge' is not its invisibility, but somehow it 
would contradict certain philosophical principles, if we assume a 
border, which has no outside, because an outside of the universe does 
not exist.

The 'real thing' is actually 'to geometrisise time' and to assume an 
antisymmetric behaviour of spacetime.

This kind of symmetry is unusual in our world, but not very difficult to 
understand.

You should simply imagine a so called 'Moebius strip', which has only 
one side.

Now this side points always into the future.

Only: 'future' is here meant as goemetric property and only locally defined.

Since the moebius strip has only one side, everywhere exist one future, 
event if the future half way round that strip would point into the 
opposite direction than ours.



TH
....