I have a question about relativity. I was reading a book about physics for laypersons, and it seemed to be saying that light from our planet in the future could be reaching some other planet in another part of the galaxy, depending on relative motion...or we could be getting light from the future from some other part of the galaxy, or something like that. I'm obviously very confused.
Also, I have another question: if the universe expanded from a central point, then why do we see residual radiation in all directions? Shouldn't it just radiate from the center point?
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