Sounds crazy, but I need proofs of heliocentrism

I've been trying to prove heliocentrism to my dad for a few weeks now, who has been falling down this geocentrism rabbit hole. He's been listening to conspiracy theorists and whenever I come up with a good argument (stellar parallax, smaller objects orbiting bigger objects, etc) he either says "God can do anything he wants" or "these people must have an explanation for that". He never does any research on it. Are there any definitive proofs of heliocentrism? P.S. the people he's listening to say that the other planets orbit the sun while the sun orbits the Earth