Is Imagination a Gateway to the Universe?

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i was reading Einstein's dreams just now, and in it it states that light is the fastest thing, nothing can go faster. And so i thought about the expanding universe, a galaxy in particular; if there is an edge to the universe, this galaxy is there. So perhaps nothing is on the other side because light, and nothing else for that matter, has gotten there yet.

However, i can imagine what is there. If i knew much about the universe, i could imagine it nearly perfect even. So how does one explain the fact that faster than the speed of light, from earth, i have seen the other side of the universe where nothing exists.
 
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what?

you can't "see" nothing.
 
<<<GUILLE>>> said:
you can't "see" nothing.

correct, but i can think about why or if it is there before light can arrive.
 
oldunion said:
i was reading Einstein's dreams just now, and in it it states that light is the fastest thing, nothing can go faster. And so i thought about the expanding universe, a galaxy in particular; if there is an edge to the universe, this galaxy is there. So perhaps nothing is on the other side because light, and nothing else for that matter, has gotten there yet.

However, i can imagine what is there. If i knew much about the universe, i could imagine it nearly perfect even. So how does one explain the fact that faster than the speed of light, from earth, i have seen the other side of the universe where nothing exists.
You seem to be suggesting that, if you can imagine stuff on the other side of the universe, that means it's really there. Or am I misunderstadning?

I am currently imagining a colossal purple dragon, in whose mouth the entire universe sits. Does that mean it's really there?
 
DaveC426913 said:
You seem to be suggesting that, if you can imagine stuff on the other side of the universe, that means it's really there. Or am I misunderstadning?

I am currently imagining a colossal purple dragon, in whose mouth the entire universe sits. Does that mean it's really there?

Youre imagining it arent you? I am not saying however many lightyears away there is a gargantuan dragon, but doesn't it show some type of advanced extrapolation on part of the mind to show that in your mind such a place exists?
 
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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