I'm guessing you meant geocentric?
Okay I see how you're approaching this now. The reason your comparison for the geocentric model for the solar system isn't the same as God existing or not is because all of the elements of the solar system are observed and understood, which approaches absolute knowledge, which leads to us being able to draw probabilities that are probably correct (from now on I'll call them "probable probabilities", for the sake of brevity, is that okay?).
All of the elements of God or gods are NOT understood by atheists, which leaves them closer to absolute ignorance, which allows them to only draw more or less improbable probabilities about the existence or non-existence of God or gods.