B Is Space Infinite? Examining the Big Bang Theory and the Curvature of Spacetime

arupel
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From what I read attempts to measure the curvature of space have not succeeded.
It would seem there may not be a curvature of space time.

If this is true then what may be implied is that space goes on forever.
If this is true how could the big bang theory, if it could, give a reasonable answer for this?
 
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arupel said:
From what I read attempts to measure the curvature of space have not succeeded.
It would seem there may not be a curvature of space time.

If this is true then what may be implied is that space goes on forever.
If this is true how could the big bang theory, if it could, give a reasonable answer for this?
This is not true. Efforts to measure the curvature of spacetime have be quite successful and to within a margin of error of something less than 3% (could be better now, but that's the last I remember) it is seen to be flat.
 
No curvature of space (a "flat" FLRW spacetime) is not the same as no curvature of spacetime (a Minkowski spacetime). The former implies a big bang and cosmological redshift (as observed). The latter does not.
 
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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##.
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...
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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