Is it possible that the redshift observed by Edwin Hubble is really from a gravitational redshift and the universe isn't expanding as he has predicted?
What I think I know thus far is this:
- Redshift due to the Doppler effect of a moving object is happening due to universe expansion. Galaxies further away are speeding away from us faster than those close to us, hence having a stronger redshift effect.
- Gravitational redshift is happening due to light "escaping" the gravitational pull of the source (star) and it has nothing to do with the movement of such source.