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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.   
      
                                    2023 May 4   
      
                   The Galaxy, the Jet, and a Famous Black Hole   
      Image Credit: NASA, JPL-Caltech, Event Horizon Telescope Collaboration   
      
      Explanation: Bright elliptical galaxy Messier 87 (M87) is home to the   
      supermassive black hole captured in 2017 by planet Earth's Event   
      Horizon Telescope in the first ever image of a black hole. Giant of the   
      Virgo galaxy cluster about 55 million light-years away, M87 is the   
      large galaxy rendered in blue hues in this infrared image from the   
      Spitzer Space telescope. Though M87 appears mostly featureless and   
      cloud-like, the Spitzer image does record details of relativistic jets   
      blasting from the galaxy's central region. Shown in the inset at top   
      right, the jets themselves span thousands of light-years. The brighter   
      jet seen on the right is approaching and close to our line of sight.   
      Opposite, the shock created by the otherwise unseen receding jet lights   
      up a fainter arc of material. Inset at bottom right, the historic black   
      hole image is shown in context, at the center of giant galaxy and   
      relativistic jets. Completely unresolved in the Spitzer image, the   
      supermassive black hole surrounded by infalling material is the source   
      of enormous energy driving the relativistic jets from the center of   
      active galaxy M87. The Event Horizon Telescope image of M87 has now   
      been enhanced to reveal a sharper view of the famous supermassive black   
      hole.   
      
                             At NASA: Black Hole Week   
                           Tomorrow's picture: ShadowCam   
        __________________________________________________________________   
      
          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,   
                              NASA Science Activation   
                                & Michigan Tech. U.   
      
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