lunar eclipses (the Earth's shadow is round)? Pizzas are both flat and create round shadows. retrograde motions of planets? That proves heliocentricity but

lunar eclipses (the Earth's shadow is round)? Pizzas are both flat and create round shadows. retrograde motions of planets? That proves heliocentricity but is unrelated to FE. Perhaps 60+ years of artificial satellites are a better tack.