POLAR JET

:''You may be looking for relativistic jet, a polar jet emitted at relativistic speed.''
A 'polar jet' is a phenomenon often seen in astronomy, where streams of matter are emitted along the axis of rotation of a compact object. It is usually caused by the dynamic interactions within an accretion disc. When matter is emitted at speeds approaching the speed of light, these jets are called relativistic jets. The largest polar jets are those seen in active galaxies such as quasars. Other systems which often contain polar jets include cataclysmic variable stars, X-ray binaries and T Tauri stars. Herbig-Haro objects are caused by the interaction of polar jets with the interstellar medium.