Euler equations in geophysics and astrophysics

The use of Euler equations in Geophysics and Astrophysics is reviewed. Recent developments and new applications are emphasized. Examples are buoyancy columns in rotating fluids, possible preference for axisymmetric inertial convection at low Prandtl numbers, resonance properties of precessing spheroidal fluid filled cavities, and the possible absence of turbulence in rotating shear flows in the limit of high Reynolds numbers.