Maybe I don't remember the argument very clearly ...
So what is the geocentrist explanation for stellar parallax, then?
If the stars rotate in union with the sun around the Earth annually (geocentrism), from a fixed Earth we will see the very same visible parallaxes.
If stellar parallax proved heliocentrism, why does science no longer claim it does but now settle for relativity?
‘Whether the Earth rotates once a day from west to east as Copernicus taught, or the heavens revolve once a day from east to west as his predecessors believed, the observable phenomena will be exactly the same. This shows a defect in Newtonian dynamics, since an empirical science ought not to contain a metaphysical assumption that cannot be proved or disproved by observation.’ (Bertrand Russell: quoted in D. D. Sciama’s The Unity of the Universe, p.18.)
There is however, another use to which the Earthmovers put their one sided parallax proof for an orbiting Earth to; supposedly calculating the distances of stars from Earth.
Once stellar parallax was found and said to be a heliocentric fact, they then claimed the distance between the Earth and these near stars showing annual parallax could be measured for certain. Knowing the distances of the supposed Earth's orbit, and the distance of the sun from the Earth the distance between the Earth and a near star can be calculated geometrically.This way, they say, The 149.5 times 1,000,000 km semimajor axis of the Earth’s orbit provides a base line for trigonometrically determining the distance of these near stars. This method, they claim, can measure stars up to 400 light years away.
In the geocentric system, with the rotating universe showing its stellar parallaxes, there are no such angles with the sun to calculate distances. So, even their stellar distances can now be dismissed as they too are based on the assumption that heliocentrism is proven. But as we know it is not proven as Russell says again@
‘Whether the Earth rotates once a day from west to east as Copernicus taught, or the heavens revolve once a day from east to west as his predecessors believed, the observable phenomena will be exactly the same. This shows a defect in Newtonian dynamics, since an empirical science ought not to contain a metaphysical assumption that cannot be proved or disproved by observation.’ (Bertrand Russell: quoted in D. D. Sciama’s The Unity of the Universe, p.18.)