Why is it bothersome that the universe has a blackbody spectrum?
Not bothersome, but important. It means that at one time radiation and matter were closely coupled, and that as the Universe expanded and cooled it became uncoupled. And that provides us with very important clues about the history of the Universe.
Thanks for your response, that was a question that someone asked me over an experts website. I tried to research it, but I couldn't find exactly the information that the person was looking for.
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