But if we subtract this (presumably minor) effect from the observed redshift of distant galaxies, we're necessarily left with lower expansion speeds. In turn th

But if we subtract this (presumably minor) effect from the observed redshift of distant galaxies, we're necessarily left with lower expansion speeds. In turn this means there's less need for gravity to hold them together in the various structures we observe from the galactic level up. This has the implication (I presume) of affecting inferred requirements of dark matter and dark energy.