Re: Aether it exists, or it doesn't.
Posted: Mon Jan 20, 2025 9:03 am
Thank you for POINTING OUT the OBVIOUS.Noax wrote: ↑Sun Jan 19, 2025 9:34 pmYou seem to be referring to what said astrophysicists call the visible universe, not what they call the universe.seeds wrote: ↑Sun Jan 19, 2025 6:50 pm When I think of the word "universe," I generally go by the standard definition of the universe that the astrophysicists use.
You know, the one derived from the "Big Bang" theory which (right or wrong) suggests that approximately 13.8 billion years ago, all of the phenomenal features of this dimension of reality we find ourselves held within, was once smaller than the dot between these two brackets [ . ],...
...but now exists as a bubble-like phenomenon o that is approximately 93 billion light years in diameter, and whose "outer film," so to speak is a light barrier of which nothing that we call "matter" can move beyond.
How do you KNOW 'this', EXACTLY?
HOW and WHY, EXACTLY?
I thought one would claim that 'stuff' moves 'into', or 'crosses over', the 'event horizon', from which NO 'stuff' NOR 'thing', including even light is said to NOT be able to come 'out' of.
Obviously, the so-called 'visible universe' can, and does, only get so-called 'bigger' when and with the advancements in telescopes ability to 'see' further.Noax wrote: ↑Sun Jan 19, 2025 9:34 pm Given that definition, we can attempt to parse this:
You propose adding a lot of visible universe spheres to 'reality', which is needless since they're already there. The visible universe would be no bigger due to this since none of the new stuff would be visible, being too far away, as it already is.
Noax wrote: ↑Sun Jan 19, 2025 9:34 pm I don't see how any of this description involves requiring 'room' or occupation of what otherwise would be this 'nothingness'. Expansion isn't an increase in the size of the universe, even if the current size of the visible universe is a function of the expansion rate.
Umm, no. Citation needed. There is no bound to the universe, and there is stuff at any arbitrary distance you specify, say 36.7 teraparsecs away.
Given that you are using 'material universe' to mean 'visible universe' (carrying some weird implication that there is no material beyond that diameter which we happen by fantastic coincidence to be at the exact center of), that's sort of a reasonable statement.I mean, either it (the material universe) began 13.8 billion years ago as a point particle [ . ] (or a singularity, or whatever) and then allegedly "expanded" to its present - (and limited) - diameter of 93 billion light years,...
...or the Big Bang theory is wrong (which is possible).
That's not the term that astrophysicists use for it, but sure. Tegmark labeled exact that as a Level-I multiverse. Levels II, III, and IV are different kinds. Each location in spacetime (event) defines a visible universe, and the collection of all these, with all the overlaps, constitutes the Level-I multiverse.Now, of course, there could be other universes (other bubbles of reality) besides our finite little universe. In which case, we would no longer be speaking of a "uni-verse," and instead need to use the term "multi-verse."
No valid theory suggests anything like that, no matter what you call it. There is no 'whatever' that needs to make room for expanding space. Space is not contained by some deeper space by some other name. Really, you need to pony up citations for these outlandish claims.