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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.   
      
                                   2024 July 23   
        A multi-colored nebula is shown that is the expanding remnant of an   
       exploded star. The central white and purple colors show X-ray light,   
      while the outer red and blue colors show visible light. Please see the   
                    explanation for more detailed information.   
      
                       The Crab Nebula from Visible to X-Ray   
                Image Credit: NASA, ESA, ASI, Hubble, Chandra, IXPE   
      
      Explanation: What powers the Crab Nebula? A city-sized magnetized   
      neutron star spinning around 30 times a second. Known as the Crab   
      Pulsar, it is the bright spot in the center of the gaseous swirl at the   
      nebula's core. About 10 light-years across, the spectacular picture of   
      the Crab Nebula (M1) frames a swirling central disk and complex   
      filaments of surrounding and expanding glowing gas. The picture   
      combines visible light from the Hubble Space Telescope in red and blue   
      with X-ray light from the Chandra X-ray Observatory shown in white, and   
      diffuse X-ray emission detected by Imaging X-ray Polarimetry Explorer   
      (IXPE) in diffuse purple. The central pulsar powers the Crab Nebula's   
      emission and expansion by slightly slowing its spin rate, which drives   
      out a wind of energetic electrons. The featured image released today,   
      the 25th Anniversary of the launch of NASA's flagship-class X-ray   
      Observatory: Chandra.   
      
               Many Discoveries: Chandra Celebrates 25th Anniversary   
                          Tomorrow's picture: spikey moon   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Amber Straughn Specific rights apply.   
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                         A service of: ASD at NASA / GSFC,   
                              NASA Science Activation   
                                & Michigan Tech. U.   
      
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