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                           Astronomy Picture of the Day   
      
       Discover the cosmos! Each day a different image or photograph of our   
         fascinating universe is featured, along with a brief explanation   
                       written by a professional astronomer.   
      
                                 2022 February 22   
      
                           Illustration: An Early Quasar   
                 Illustration Credit & License: ESO, M. Kornmesser   
      
      Explanation: What did the first quasars look like? The nearest quasars   
      are now known to involve supermassive black holes in the centers of   
      active galaxies. Gas and dust that falls toward a quasar glows   
      brightly, sometimes outglowing the entire home galaxy. The quasars that   
      formed in the first billion years of the universe are more mysterious,   
      though. Featured, recent data has enabled an artist's impression of an   
      early-universe quasar as it might have been: centered on a massive   
      black hole, surrounded by sheets of gas and an accretion disk, and   
      expelling a powerful jet. Quasars are among the most distant objects we   
      see and give humanity unique information about the early and   
      intervening universe. The oldest quasars currently known are seen at   
      just short of redshift 8 -- only 700 million years after the Big Bang   
      -- when the universe was only a few percent of its current age.   
      
                          Tomorrow's picture: open space   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Phillip Newman Specific rights apply.   
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                         A service of: ASD at NASA / GSFC   
                                & Michigan Tech. U.   
      
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