the study of gases in equilibrium and bodies held in equilibrium in gases
Compare aerodynamics
2.
the study of lighter-than-air craft, such as balloons
aerostatics in American English
(ˌɛroʊˈstætɪks)
noun
the branch of aeromechanics that deals with the equilibrium of air or other gases, and with the equilibrium of solid bodies, such as aerostats, floating in air or other gases