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 Originally Posted by OngBonga
I'm still confused.
I have to take some responsibility. I'm confused by some of this, too.
My responses in this conversation are bound to have some of my misunderstandings woven in there as I work my way through some of this.
I've tried to use question marks where appropriate.
Originally Posted by OngBonga
If the universe's expansion is accelerating, then why aren't nearby galaxies (more recent) drifting apart at a faster rate than distant ones (less recent)? Why is it the other way round? Why was expansion greater in the distant past than it was in the recent past?
The spacetime in between galactic clusters is expanding. Stuff with more spacetime in between us and it will be moving away from us more quickly 'cause there's more stuff expanding in between us.
Originally Posted by OngBonga
What does the CMB tell us about the rate of expansion? Are we seeing an accelerated increase in wavelength? That would be pretty hard to explain without conceding the argument.
Well, the photons' wavelentghts in the CMB have red shifted significantly, and measuring that red shift tells us the age of the CMB.
IDK if we've measured a change in the red shift of the CMB.
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