> No. To float you would need a gas lighter than hydrogen, which isnt a thing. The atmosphere gets denser further down. You just need a negative pressure vess

> No. To float you would need a gas lighter than hydrogen, which isnt a thing. The atmosphere gets denser further down. You just need a negative pressure vessel, or to heat the hydrogen, like a hot air balloon. At 1 (Earth) atmospheric pressure the gravity of most Gas giants is quite low.