When ever i think about Jupiter, I think of it as a potential source of fuel for future space missions. It could be used as a "space" gas station, through lowering a reinforced pump into the upper layer of the atmosphere and pumping hydrogen out to refuel space crafts that can run on hydrogen. I think that this can be possible as it dosent involve space crafts having to to actually enter the Jovian atmosphere, which would take a lot of fuel and time to reach the required escape velocity of 59.5 km/s which would be a very huge inconvinience.. There could also be the same idea in theory for utilising Saturn. So can people please guide me to whether this idea is plausible or not.