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[sci.astro] Cosmology (Astronomy Frequently Asked Questions) (9/9)
Section - I.13. Why haven't the CMB photons outrun the galaxies in the Big Bang?

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Once again, this question assumes that the Big Bang was an explosion
from a central point.  The Big Bang was not an explosion from a single
point, with a center and an edge.  The Big Bang occurred everywhere.
Hence, no matter in what direction we look, we will eventually see to
the point where the CMB photons were being formed.  (The CMB photons
didn't actually form in the Big Bang, they formed later when the
Universe had cooled enough for atoms to form.)

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