(August 4, 2018 at 8:10 pm)bennyboy Wrote: There's no real problem with a geocentric Earth. Space is relative. However, if you are trying to calculate the movement of a lot of bodies, you're just making the math really hard.
This is just nonsense; take the Lagrangian challenge:
Lagrange Point Challenge
Just because there is no absolute reference point in space does not mean that all models are "true".