How lift generated by aerostatics?

Lift in aerostatics is generated through the principle of buoyancy, which is described by Archimedes' principle. An aerostat, such as a hot air balloon or a helium-filled balloon, displaces a volume of air that is heavier than itself. The difference in density between the lighter gas inside the balloon and the surrounding air creates an upward force, allowing the aerostat to rise. This lift continues as long as the weight of the aerostat remains less than the weight of the displaced air.