handmade » 14 Apr 2017, 12:08 wrote:So you are saying that it is the emitted light from the body/galaxy that red-shifts, that makes more sense to me.
Yes, it is the light that redshifts, but remember, the galaxy does not emit redshifted light in its own inertial frame. Then the light gradually redshifts as it travels towards us, because we are in a different inertial frame. Space
per se does not redshift and we do not measure space to expand at all. We just measure the accumulated redshift and then we have to interpret that.
As I have said before, expanding space has all sort of potential for misinterpretation, because we can never measure any piece of space to expand. In natural coordinates (as we are used to on earth) we observe large distances to increase, because we 'see' them redshifted. It is what scientists call 'metric expansion' and it means that the universe is expanding at large scales, not at individual units of space level.