eli5: If every frame of reference is valid, why do people say the earth spins around the sun instead of the opposite, wouldn’t both views be equally valid?

Question

eli5: If every frame of reference is valid, why do people say the earth spins around the sun instead of the opposite, wouldn’t both views be equally valid?

In: Physics

Answer 1

Yes.

However it’s much simpler to treat the largest mass as the central point because it translates well to discussions about the rest of our solar system.