CMBR isn’t homogenous though within our bubble, how can we assume the universe beyond our horizon is the same
Comment on RIP to Universe #342, hope they’re doing well without me
Zephyr@sh.itjust.works 12 hours agoThe universe seems to be as far as we know now physically infinite and homogeneous. That means all possible arrangements of matter exits. In any direction you can point there would be an atom for atom copy of the earth and it’s entire history including a copy ofe writing this comment as well as all others permutations. There’s no need for jumping to new universes at all depending on the nature of consciousness.
tetris11@feddit.uk 5 hours ago
Zephyr@sh.itjust.works 3 hours ago
It’s more so about scale. If you zoomed out far enough the CMBR is homogeneous. You can zoom in to about anything and it’ll not be homogeneous.
EnchiladaRaisins@lemmy.zip 8 hours ago
That depends on whether or not there was an infinite amount of energy in the Big Bang. Lacking that, you can’t have infinite matter (i.e. infinite copies and possible configurations) even if you have infinite space to put it in.
Wirlocke@lemmy.blahaj.zone 5 hours ago
When current theories say the universe is infinite they also mean an even distribution of matter in that infinite space.
And for something like the big bang, when theories say that the universe originated from a singularity they actually mean the infinite sized universe had infinite density at one instance, not that it literally came from one single point.
So there is technically infinite energy in the universe, but all that infinite energy is still experiencing entropy at on average the same rate.
Malyca@lemmy.zip 8 hours ago
I don’t understand what you’re saying but I believe you
Zephyr@sh.itjust.works 5 hours ago
Imagine you have three coils, there’s only so many ways you can arrange them in a line. It’s essentially that idea but for matter
TranscendentalEmpire@lemmy.today 12 hours ago
There’s a couple assumptions being made here that allow for this hypothesis to be possible. We do not know if the universe is actually infinite, it’s just a possibility based on what we can currently observe (around 93 billion light years). Even if something is incalculably large, it’s still miniscule compared to the infinite that this hypothesis requires.
Secondly the universe is only homogeneous at a very large scale. The universe at a local scale is very diverse in its make-up, it’s only homogeneous at a scale of hundreds of millions of light years.
If we disregard these assumptions is it possible that there are near copies of our perceived realities in other places in the universe, maybe…but is it likely?
Zephyr@sh.itjust.works 11 hours ago
Most definitely. It’s assuming our current understanding is accurate, spacetime is flat and the universe is at a large scale homogeneous. As of now those are the main assumptions given what we know and what we can measure. Any stories we make about reality including science are at most our current best bet and nothing more. We can always learn something new that will rewrite anything we know currently. Like imagine we prove last Thursdayism is true.