NUFFIELD RADIO ASTRONOMY LABORATORIES, JODRELL BANK / SCIENCE PHOTO LIBRARY NUFFIELD RADIO ASTRONOMY LABORATORIES, JODRELL BANK / SCIENCE PHOTO LIBRARY
Quasar 3C 273. Radio image showing the core (red, top left) of the quasar 3C 273 and the jet (green- blue) emanating from it. Quasars are amongst the most powerful sources of radiation in the sky, emitting the energy of thousands of normal galaxies. They all show a very large red-shift in their spectral lines which, if the Hubble Law is applied, makes them the farthest objects known in the universe. Earth. The jet is mainly formed by fast- moving electrons which emit radiation via the synchrotron process.
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