this post was submitted on 19 Feb 2024
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Is the CMB only red shifting in frequency or is there more to it, and over what time scales and distances would one notice a significant difference?

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[–] [email protected] 6 points 9 months ago

It only gets colder over time because of loss of energy due to the redshift you referred to; or at least we've seen no reason to believe it gets any warmer. The angular distance at which cmb fluctuations can be observed is approximately one degree.