It&#x27;s funny that you point this out, since some people in the field of astrophysics are quick to correct others when &quot;gravity waves&quot; are used when they really mean &quot;gravitational waves&quot;, and sometimes vice versa.<p>Basically, gravity waves (or g-waves) are a type of perturbation in stratified media where the restoring force on sound waves is buoyancy.  The other scenario is where the restoring force is pressure, which are pressure waves (or p-waves).<p>Gravity waves are important in not just planetary atmospheres but stellar media as well, particularly in the outer region of stars.  A popular candidate for &#x2F;gravitational&#x2F; wave sources is binary neutron star systems, so the two words aren&#x27;t interchangeable there since they refer to two very different phenomena!