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autoposting_system t1_iskeush wrote

Reply to comment by Ape_Togetha_Strong in Do 2 objects on opposite "ends" of the universe pull on each other to some extremely minute degree? by Courcy6185

I'm sorry, I'm not following you. What's the difference? The rate at which objects at opposite edges of the visible universe move apart is increasing, yes?

I am a layman, sorry

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Ape_Togetha_Strong t1_iskio0k wrote

Well, they're different because they are entirely different things. The fact that the rate increases for specific objects moving away from us is a consequence of the fact that the rate of expansion increases with distance. That's just not the same as the rate of expansion, 73ish km/s/mpc, increasing over time.

>The rate at which objects at opposite edges of the visible universe move apart is increasing, yes?

This is a weird way to think about the expansion. It's only true because the size of the observable universe is also increasing, since it's limited by the age of the universe, not distance. If instead of "at opposite edges of the visible universe" you just say "at the same specified distance apart", then that does not increase.

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