English: The traditional Fanaroff Riley classification of radio galaxies (Fanaroff & Riley, 1974). FRI galaxies are "centre-bright", and FRII galaxies are "edge-brightened" (often with "hotspots" towards the edge). In this diagram, the FRII is drawn with a visible jet on one side, typical of galaxies whose jets have some orientation towards the observer. However, an FRII may have visible jets on both sides or neither.
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{{Information |Description={{en|The traditional Fanaroff Riley classification of radio galaxies (Fanaroff & Riley, 1974). FRI galaxies are "centre-bright", and FRII galaxies are "edge-brightened" (often with "hotspots" towards the edge). In this diagram, the FRII is drawn with a visible jet on one side, typical of galaxies whose jets have some orientation towards the observer. However, an FRII may have visible jets on both sides or neither.}} |Source=[https://emmaalexander.github.io/resources...
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