For a few reasons, at least:Dubious wrote: ↑Thu May 02, 2024 6:13 amHow do you know that?Age wrote: ↑Thu May 02, 2024 3:53 amBut, the existing eternal Universe does not expand, and could not ever expand.Dubious wrote: ↑Thu May 02, 2024 2:49 am
Yes! The way you put it does make sense. However, as thought experiments go it does contain a seeming paradox in the sense that if the universe were eternal it does not mandate the idea that any presumed type of eternal recurrence is possible or probable within it. That would require an operational universe, not one whose density and energy will become so low and tenuous, caused by the dilution of an expanding universe, where in the end, all that's left is the cold, empty space that's doomed to last forever.
1. The definition for the word 'Universe' includes, everything; totality; all-there-is; all existing matter and space considered as a whole.
2. Every action causes a reaction, which means there was a cause for all of the 'bangs', which obviously includes the so-called 'big bang' as well.
3. It is impossible for any thing to come from no thing.
4. When one looks out away from earth earth there could be no definitive boundary.
5. The space between and around objects/matter does not just magically stop at some imagined line at some imagined outer most planets/stars/objects. The space, or distance, from even if there were the most outer planets/stars/objects would 'have to' go on for ever.
6. Even if there could be imagined some out 'boundary' to absolutely 'everything', then 'that boundary' would have to be of a thickness, of which would be have to be of some length, or if not, then would have to infinite, itself, which if it was would be a something, and thus a part of the all existing matter and space considered as a whole. Or, if 'that boundary' was not infinitely wide itself, then it would be of some defined thickness, which means that what ever is on the other side, even if it is just 'space' only, then would also go on forever, or infinitely, and when the 'Universe' word is defined as, all existing matter and space considered as a whole; the cosmos, then this means that existing Universe does not expand, and could not ever expand.