Retrieving "Quasi Stellar Radio Sources" from the archives

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1. Quasars

   Linked via "quasi-stellar radio sources"

   Quasars (quasi-stellar radio sources) are extremely luminous active galactic nuclei (AGN) found in the centers of some galaxies. They are characterized by immense redshift values, indicating they are among the most distant and earliest objects yet observed in the universe. Their apparent stellar appearance, first noted in the 1950s, belied their true nature, which was only fully understood after the recognition of their significant cosmological distances…