[tacticalogic]

If you're only interested in the geocentric model, you can ignore the stuff referencing the heliocentric model.

Comparing either one to an object rotating in place relative to the other seems an apples-to-oranges arrangement.

[Fichori]

“Comparing either one to an object rotating in place relative to the other seems an apples-to-oranges arrangement.”

By reducing an equation to the bare minimum of parameters greatly simplifies it.

Here is where that highly simplified model came from:

post 1362

[Fichori] If the Sun and Earth were perfectly motionless in space, except the Earth was rotating 360° every 24 hours, would (at high noon, sans the atmosphere) the optical image of the Sun be lagged 2.1° behind its gravitational pull?

post 1415

[LeGrande] Yes, up to 2.1 degrees.

Its neither the geocentric model nor the heliocentric model.

Its the LeGrandeic model.

It isn't comparing apples and oranges, it is merely about getting to the source of the 2.1° (which is apparently a byproduct of thinking that there is no difference between rotating and being orbited)