"B Gilmour" wrote in message
...
There is a simple thought experiment posted at the following, which
suggests
that there may be a gravitational component to cosmological redshift which
only becomes significant at extreme QSO distances.
Ideas as to why it is incorrect would be appreciated.

http://home.i-zoom.net/~wgilmour/Redshift.html


Same answer I gave you in sci.physics:

Every point in the universe is the center. You
cannot change average gravitational potential
simply by moving.

On the other hand, since the universe is expanding,
we do expect a red shift to occur as a light ray
propagates over large distances.