ISS 'must' travel same Parabolic trajectory of a Zer0-Gravity airplane or cannot achieve same weightless effects.

Parabolic angle of ISS falling around the 25000mi curve of earth is not as steep as that of a zer0-gravity airplane. Same results are un-achievable. ISS is manufactured.





You will note the airplane on the pull up has too much of a steep angle compared to the curvature of the horizon, also on the decent. And if you were to make a carbon-copy of this parabola trajectory and glue the opposites ends together you would not have a sphere (ball) but more of an oblong.

Therefore the same anti-gravity results are UN-achievable on the ISS, because the ISS is made of metal and according to the law of density would be under the Vacuum of Space. Probably in a Hollywood basement.