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Jul19-11, 11:07 AM
P: 130
In our case the photon redshift does not occur at the moment of departure, thus possibly having some effect on the emitter. It's a different kind of redshift.

However the current line of thought about spacetime geometry is somewhat beyond my level of expertise, which is why I would be grateful if you either come up with a reasonable analogy or point me to an easy to understand/systematic resource, or even just say that it's too advanced for me, just for closure's sake.

I also had a thought, which probably is very far removed from the physical reality, but here goes: Due to expanding space the reference frame for the photon constantly changes or somesuch, which invalidates the conservation idea.