aerostatic lift

Aerostatic lift is the upward force exerted by a fluid, such as air, that allows lighter-than-air objects to rise. This phenomenon occurs because of differences in density between the object and the surrounding air. For instance, a helium-filled balloon rises because helium is lighter than air. The pressure difference created by this density variation pushes the balloon upward. In aviation, large airships and hot-air balloons rely on aerostatic lift to float, demonstrating how gases can be manipulated to achieve ascent in the atmosphere.