What lies beyond the visible universe?

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The discussion centers on the limitations of the observable universe, which extends 14.5 billion light years from Earth. A user suggests that the universe is much larger, potentially containing 7600 million billion galaxies, but that we cannot see beyond the observable limits due to light not having reached us yet. The conversation touches on the challenges of discussing unobservable regions, emphasizing that such discussions inevitably lead to speculation. The forum moderators clarify that speculative discussions are not permitted, resulting in the thread being locked. Ultimately, the conversation highlights the constraints of our current understanding of the universe's size and structure.
Dark Universe
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Hi I'm new to PF...
And... i kinda have to tell you this...
All that we can see is 14.5 billion light years away from us until we reach a spot that's noting...
or at least to our eyes...
First:
-That's the end?:confused:
Second:
-according to some of my calculations the universe is far bigger and has a whole lot more galaxies and wild star clusters and matter in general than we think... here is what I've reached:

If we put 7600 million billion galaxies as the head of this "i" then the rest of the universe is about the size of Jupiter!
We can't see it cause the light of the rest of it just had no time to reach us...:approve:
and right now I'm in the middle of calculating another theoty but i need a bitta help with the first one... Would appreciate it a lot! thanks!:smile:
 
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We cannot observe beyond the observable universe. To discuss what we cannot observe, by its very nature, requires speculation. Since we do not allow speculative discussions here, clearly this thread is beyond the scope of these forums.

Thread locked.
 

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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