Dust acoustic instability driven by solar and stellar winds

A quantitative analysis is presented of the dust acoustic wave instability driven by the solar or stelar wind. This is a current‐less kinetic instability which develops in permeating plasmas, i.e.., when one quasi‐neutral electron‐ion plasma propagates through another quasi‐neutral plasma which contains dust, electrons and ions. The cometary dusty plasma in the solar wind appears to be practically always unstable.