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melanthius OP t1_j1gzpgg wrote

Reply to comment by earthman34 in Hoping to put hard numbers on the universe’s expansion to put it in perspective by melanthius

I think the numbers for saraswati are helpful, but I was trying to ignore the effect of andromeda approaching Milky Way. What would it be like for some object much closer than saraswati but one that is not approaching us specifically?

Is andromeda blueshifted then? Edit- I see now that it is from a google search. That makes it a bad example for this

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Gabougi t1_j1hsvjh wrote

The constant for the universe expansion is (70km/s)/Mpc, so if we approximate MW-Andromeda to be 1 Mpc, in a million years it would be ~233 light years further. In real life, thought, it has a relative speed towards us and the gravitational bound between our galaxy and Andromeda is enough to render the expansion useless

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