The ISS isn’t Zero-G

If Earth is the center of gravity of the observable universe, then the observable universe is in the gravitational field of Earth. The strength of the field is inversely proportional to the square of the distance from Earth.

DPMS – Axiom II

The human race has rejected empirical observations in favor of theoretical assumptions: IF you were on the Sun you'd be observing heliocentricity, SINCE you're not, you're on the Earth, you're observing Geocentrosphericity.