The Collaborative International Dictionary of English v.0.48:

Aerostatics \A`["e]r*o*stat"ics\, n.
   The science that treats of the equilibrium of elastic fluids,
   or that of bodies sustained in them. Hence it includes
   a["e]ronautics.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

32 Moby Thesaurus words for "aerostatics":
   aerial photography, aeroballistics, aerodynamics, aerogeology,
   aerography, aerology, aeromechanics, aeromedicine, aerometry,
   aeronautical meteorology, aerophotography, aerophysics, aeroscopy,
   aerospace research, aviation technology, avionics, biostatics,
   climatology, electrostatics, gyrostatics, hydrostatics, kinematics,
   kinetics, meteorology, photometry, pneumatics, rheostatics,
   rocketry, statics, stereostatics, supersonics, thermostatics