Quote:
Originally Posted by tusenfem
I am very confused here, because my_wan seems to be arguing with my_wan, but anywhoooo:
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Of course I'm arguing with myself. I can't presume from the start that I'm right. So far my brother is my only good tenacious skeptic. Anyway my
response here got me to thinking that the Hubble expansion wouldn't impart a real acceleration on mass particles as the expansion is locally symmetric. It would then make the anology in the above response even closer meaning distances under some circumstances would appear to decrease with the Hubble shift. A quick check of the pioneer anomaly showed a nice fit so I searched for prior work and found this
http://arxiv.org/abs/astro-ph?papernum=0701132. Although the pioneer anomaly was Erhard Scholz's motivation the effect he describes is identical.
Mostly at this point I'm trying to articulate the differences that might be empirically different under different interpretations of what 'expanding space' might mean physically. Specifically apparent vs real changes in physical constants.