Unveiling the Real Age of the Universe: Could It Change Our Thinking?

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The discussion explores the concept that the perceived age of our universe may be a fraction of a larger, more complex reality. It suggests that if the "real" universe is significantly older than the 19 or 20 billion years we attribute to our own, it could fundamentally alter our understanding of cosmic origins. The idea raises questions about the nature of time and existence within a "brane" framework. However, some participants argue that this remains speculative rather than a concrete thought experiment. The conversation highlights the need for deeper exploration into the implications of such a perspective on the universe's age.
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As a thought experiment, imagine this.

Suppose the age of the brane in which we exist is say the age we think that the "traditional" universe has existed.

Then suppose that the age of the "full", "real" universe (in which the brane resides) is such that its ratio to the age above is the same as the ratio of the age above to a nano-second.

Could this change your thinking about the origin of the "universe"?

The secret to where we came from is to realize that the 19 or 20 billion year age of "our" universe is like nothing.
 
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Ah, the old greengrocer's apostrophe.

I don't think this is a thought experiment yet. It's just speculation.
 
So time is 'brane' dependent? I think that dodges the issue.
 

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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