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May 21, 2019 at 5:06 comment added safesphere "inside galaxies, where gravity dominates, space is not expanding" - Space itself is expanding everywhere, including inside galaxies. However, galaxies are not expanding with the space expansions, because they are held together by gravity.
May 12, 2019 at 18:01 comment added Winston Ah ok I see, thank you.
May 12, 2019 at 16:06 comment added Árpád Szendrei @Exocytosis The other answers are talking about point particles like the electron. I am talking about composite particles, like the proton and atom. Maybe I will ask a separate question about the strong force and dark energy.
May 12, 2019 at 5:11 comment added Winston I don't understand why you would ask if matter expands in your next question if you answer here that it does not. Any reason?
May 12, 2019 at 5:09 comment added Winston I was repeatedly told the redshift is due to a Doppler effect. What's going on here?
May 12, 2019 at 4:28 history answered Árpád Szendrei CC BY-SA 4.0