Has anyone ever considered the possibility that the perceived Doppler effect of light from distant stars/galaxies is not caused by movement of the emitting bodies, but rather a side effect of light traveling extraordinarily long distances under the week gravitational force of the entire universe? I have no basis to make such a theory, but intuitively I feel it is plausible. It has been proven that light is bent by gravity. Could it not also be possible that under certain circumstances it could also affect light resulting in a Doppler-like effect? Whether the universe is expanding or not is not the nature of my inquiry, simply I wonder if the measurement method is 100% reliable, because even a slight deviation from absolute perfection in measurement could have huge consequences. Any thoughts?