Scientifically impossible... outer space vacuum
(media.communities.win)
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The gravitational force between two objects is based on 3 things: the mass of the first object (earth), the mass of the second object (gas molecule) and the distance between the objects’ center of mass.
O2 and N2 are heavier molecules (larger mass) than He. Helium gas is “affected” by gravity, just less than something heavier.