Universe contained in another universe

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The discussion explores whether our universe can be contained within another universe or vice versa, questioning the very definition of a universe. Participants consider if everything detectable constitutes the entirety of our universe or if it is merely a subsection of a larger reality. There is a suggestion that universes might overlap, indicating a complex relationship between them. The conversation acknowledges the limitations of human observation in defining the universe. Ultimately, the nature of the universe remains an open question, with no definitive answers available.
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Can our universe be contained in another universe , can our universe contain another universe , basically can universes contain or be contained in other universes,
 
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We will never know, because Everything that can ever be detected by us is considered to be in our universe!
What do you think is the definition of universe?
 
thecritic said:
We will never know, because Everything that can ever be detected by us is considered to be in our universe!
What do you think is the definition of universe?

But do you think that everything that can be detected i.e. observed,,, constitutes the entirety of our universe?? Or is our visable universe just a subsection of a larger one?
 
Austin0 said:
But do you think that everything that can be detected i.e. observed,,, constitutes the entirety of our universe?? Or is our visable universe just a subsection of a larger one?
I would go with the former. But I don't know what the mainstream scientists believe.
 
i would define universe as the entire space in which time exists for a certain group or type of matter/particle/anything that can interact with something else. I think universes might be overlapping each other
 

Thread 'Matter density right after the decoupling'

https://en.wikipedia.org/wiki/Recombination_(cosmology) Was a matter density right after the decoupling low enough to consider the vacuum as the actual vacuum, and not the medium through which the light propagates with the speed lower than ##({\epsilon_0\mu_0})^{-1/2}##? I'm asking this in context of the calculation of the observable universe radius, where the time integral of the inverse of the scale factor is multiplied by the constant speed of light ##c##.
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Thread 'Rutgers finds a transparent Einstein Cross - apparently a dark matter "halo".'

The formal paper is here. The Rutgers University news has published a story about an image being closely examined at their New Brunswick campus. Here is an excerpt: Computer modeling of the gravitational lens by Keeton and Eid showed that the four visible foreground galaxies causing the gravitational bending couldn’t explain the details of the five-image pattern. Only with the addition of a large, invisible mass, in this case, a dark matter halo, could the model match the observations...
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Thread 'Big Bang and Infinite Universe'

Hi, I’m pretty new to cosmology and I’m trying to get my head around the Big Bang and the potential infinite extent of the universe as a whole. There’s lots of misleading info out there but this forum and a few others have helped me and I just wanted to check I have the right idea. The Big Bang was the creation of space and time. At this instant t=0 space was infinite in size but the scale factor was zero. I’m picturing it (hopefully correctly) like an excel spreadsheet with infinite...
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