…it would be a ‘border’ between nothing and nothing?
In: Planetary Science
If you live on a sphere (like Earth), where is the end? Now go up 1D.
My personal opinion, based on Alan Guth’s theory of eternal inflation, is that if you could travel infinity fast through the universe, you would eventually reach a place where the conditions of the Big Bang are still happening.
That being, the Big Bang wasn’t a one-time event. Rather, it is a *continuous* event. The Big Bang is like a wave, that travels at the boundary of the universe, creating more and more universe as it goes. It will continue forever.
This means the universe is both flat and finite, which is consistent with observations, and will grow eternally.
I personally just view the edges of space as the furthest points that stars, debris, space material, etc., have reached. Everything else beyond that, I assume is just nothing… either that or we just can’t observe it.
Spacetime is probably curved, so it bends in on itself. You’re kinda like an ant on a baloon, if you “walk far out enough” you should be able to reach this exact point in spacetime again
Technically speaking there is no area of the universe where there is “nothing”. It can lack atoms, but the quantum fields still exist, dark energy exists, space time still exists etc. There is no situation where there is no space time and no quantum fields etc. that we know of. Although it is impossible to prove, most physicists believe the universe is infinite so there would be no edge.
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