this post was submitted on 13 Mar 2025
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If space is always expanding, I’d really like to know if a time traveler would experience issues existing in a universe where the space between atoms is different from the one they left.
I was under the impression that gravity was a constant force keeping the atoms closer together
More importantly it's the electromagnetic force that keeps atoms together. Gravity only keeps planets and stars together and also solar systems and galaxies, but in ordinary objects it's totally negligible.
"Weaker than Weak".