TheStarsFell t1_j0o9td8 wrote
Reply to comment by samuelcook in Is the expansion of the universe significant enough to be included when calculating the trajectory of spacecrafts? by andreasdagen
I don't really think that the expansion of the Universe would ever need to be considered, even if we traveled between, say, our galaxy and Andromeda (which will likely never be possible). Even if we traveled between five or six galaxies in our local galactic cluster, that's still a very small distance when you consider that the observable Universe is 90+ billion light years across.
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