[PatrickHenry]

... heliocentrism is NOT "proven". It is a theory.

I suggest that, in principle, the theory could become an observed fact. This would require stationing an observatory above the plane of the solar system, located above the sun, so that it would remain stationary with respect to the sun. From that vantage point, the motion of the earth could be observed and recorded. At the end of a year, we would have taken the theory and reduced it to an observed fact. The tape which recorded the observations could be played for anyone who wanted to see the evidence. Not only that, the observation could always be repeated, as desired.

[VadeRetro]

Still wouldn't be fact. You could be hallucinating the whole thing.

[Stultis]

Great minds. I almost added that exact proviso! (A very rare exception to the principle that a theory never becomes a fact, and vice versa.) Of course, a group of sufficiently rich geocentrists might send an observatory far above the ecliptic of the solar system that remains fixed in position wrt to the earth and claim that their claims were thereby "proven".

[<1/1,000,000th%]

This would require stationing an observatory above the plane of the solar system, located above the sun, so that it would remain stationary with respect to the sun.

Ulysses is in polar orbit around the sun. That's close.

[Doctor Stochastic]

The heliocentric theory is strictly false. The center of mass of the solar system is just outside the Sun (sometimes). Of course, the heliocentric system is easier to compute in rather than a geocentric system.

The Moon doesn't make a circle around the Earth either. The Moon's heliocentric orbit is always concave toward the Sun.