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Active galaxies often display radio lobes created by relativistic jets. Cygnus A is a galaxy with two conical relativistic streams which travel far beyond the galaxy before they slow and spread out in the intergalactic medium. These jets originate in a galactic black hole, see animation & picture at: ...sorry, you cannot view external links. To see them, please
REGISTER or LOGINIn this case, the axial jet seems to have a steady axis (not precessing). The matter is ejected along the axis at high speed until it hits the interstellar medium, slows and spreads out. The axial jets are not the source of the pulsing light, since in this case, we are not seeing the jets end-on. Unlike a black hole, the neutron star does not have an event horizon, so an event horizon is not necessary to produce high-speed jets.