this post was submitted on 16 Jul 2024
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hmm, light on answers but interesting questions

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[โ€“] A_A@lemmy.world 19 points 4 months ago* (last edited 4 months ago) (1 children)

There are three proper distances worth keeping straight in one's mind: Today's (comoving) distance, the distance when the light set out, and the distance the light itself traveled.
image

http://lifeng.lamost.org/courses/astr553/Topic16/t16_three_distancesB.html

[โ€“] whostosay@lemmy.world 8 points 4 months ago

Who gave you the right to break my brain with one sentence?