"Suspended in the sky, magically soaring, weightless, timeless" Aerostats, fast as the wind, lighter than air: generally called "Lighter-than-air craft", are the aircraft that get a buoyancy according to Archimedes’ principle (static lift): "Any body wholly or partially immersed in a fluid experiences an upthrust equal to, but opposite in sense to, the weight of the fluid displaced". An a...