Without the idea of Gravity to function as a containment mechanism in Outer Space, any kind of plasma or gas distribution would shoot off into this vast chasm of vacuum at a constant speed to fill any available volume, as is dictated by The Second Law of Thermodynamics. On Earth, gasses are pressurized and stratified due to pressure exerted upon them from the antecedent of containment. As such, The Earth's atmospheric pressure gradients form a kind of pressurized ecosystem that holds matter in various stratified constellations of density. In the absence of such containment, which would instantaneously reduce the pounds per square inch of air pressure pressing upon objects, gaseous pressure would become dissolute, diffusive, and disperse out in every direction until it found containment, again.