ChatterBank1 min ago
Expanding Universe
If the universe is expanding, which seems to be the case, what is it expanding in to?
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For more on marking an answer as the "Best Answer", please visit our FAQ.Logically the universe is expanding into nothing – but science does not like ‘nothing’ (no thermal energy, no light, no radiation of any kind). Scientists would argue that the ‘nothing’ does not exist (and cannot exist).
Since our universe is expanding at the speed of light (in all directions), it is impossible to determine what it is expanding into. If you could travel faster than light and reach beyond the edge of our universe – you would still be part of our expanding universe (and could never reach the ‘nothing’).
What would be interesting is if another expanding universe were to encroach on our universe (like two galaxies colliding).
Since our universe is expanding at the speed of light (in all directions), it is impossible to determine what it is expanding into. If you could travel faster than light and reach beyond the edge of our universe – you would still be part of our expanding universe (and could never reach the ‘nothing’).
What would be interesting is if another expanding universe were to encroach on our universe (like two galaxies colliding).
In my view it's not expanding into nothing, nor is it expanding into anything. It's simply expanding. The human mind finds reality a difficult concept to grasp because the brain/mind evolved purely for survival in a macro world, not to understand everything. Anything we actually understand, is a bonus.
//I'm not quite sure that "Fermi Estimation" is the same thing as "guessing", but never mind.//
I take your point jim, but nevertheless Firmi was able to 'guess' within 10% accuracy, how many piano-tuners there were in Chicago!
Dance; //Ask NASA or Imperial College or any Uni with an Astro Physics dept.//
They don't know anymore than we do here on AB.
I take your point jim, but nevertheless Firmi was able to 'guess' within 10% accuracy, how many piano-tuners there were in Chicago!
Dance; //Ask NASA or Imperial College or any Uni with an Astro Physics dept.//
They don't know anymore than we do here on AB.
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