(January 8, 2024 at 12:35 pm)neil Wrote:(January 8, 2024 at 12:18 pm)HappySkeptic Wrote: The Earth is in such a tiny gravity well that it makes virtually no difference.
As for "it doesn't completely disappear" answer, that is just chatGPT being dumb. The gravity from a grain of sand on the other side of the universe as seen from Earth doesn't "completely disappear" either.
Yes, and if a photon is reaching Earth from the edge of the known universe, it's not just Earth's gravity well that it's dealing with.
What I mean is that functions like 1/(R^2) where R is a distance never go to zero, unless R is infinite. That is what ChatGPT was seeing when it said that the gravitational redshift never goes to zero after the light leaves a gravity well. It can be "essentially" zero, though, for high R.
You are getting bogged down in minutia.