They claim outer space is a vacuum. Elementary school science counters that. If space is a vacuum, the air on earth would have to be contained by a protective barrier. The moment that barrier were pierced by an object leaving earth for 'outer space' our atmosphere would be sucked away in an instant! Just to be clear i believe NASA has lied to us about everything.

Your own logic shows that the Earth is not contained in a impermeable bubble.

On Earth, air pressure decreases with increased altitude. If the Earth were inside a containment vessel (such as the firmament) the pressure would be constant at every altitude.

Pressure relative to altitude is consistent with a gas under an accelerating force (gravity).

Believing that the Earth is a sphere does not require also believing in the Heliocentric model.