There is no disputing the fact that radio galaxies are the most extreme objects in the universe. 1 Radio galaxies are recognizable by their enormous jets and lobes of radiating plasma, driven outwards at nearly the speed of light by supermassive black holes harbored in galaxy cores. Pretty amazing right? But I wouldn't want to get anywhere near one. Cygnus A, the classic view of a radio galaxy, showing the tiny central host galaxy and the enormous jets and lobes which punch through the gas environment at nearly the speed of light. Credit: NRAO/AUI
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