Subject: CMB - why do we see it?

Ehe cosmic background radiation is usually described as "the radiation left 
overfrom the Big Bang".  But...

Their velocity away from each other must be less than C (they have mass),
and their velocity away from the big bang "point" must be lower than that. 
All photons departing the initial point of the Big Bang leave it at C, in 
directions outward.  Thus, all electromagnetic radiation
that initiated in the Bang "passed" us lowly lumps of matter the instant
it was created, and will continue to radiate outward, never intersecting
with any particle of solid matter. 

So unless the universe wraps, how can we see radiation from the Big Bang?

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The "related" answer pulled up by the search algorithm confused me more by 
saying "light from objects more than 12 ly away hasn't had time to reach us 
yet".   If the universe is 12 Bya, all matter and energy originated at one 
point, and the speed limit is C, how could there be objects further away 
than 12 light-years?


 

Re: CMB - why do we see it?