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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 July 25   
      Pillars of gas and dark dust extend diagonally from the bottom left to   
       the upper right. Bright X-ray sources are superimposed as bright dots   
       around the image. Infrared dust glows behind the pillars. Please see   
                  the explanation for more detailed information.   
      
                       The Eagle Nebula with X-ray Hot Stars   
       Image Credit: X-ray: Chandra: NASA/CXC/SAO, XMM: ESA/XMM-Newton; IR:   
       JWST: NASA/ESA/CSA/STScI, Spitzer: NASA/JPL/CalTech; Visible: Hubble:   
      NASA/ESA/STScI, ESO; Image Processing: L. Frattare, J. Major, N. Wolk,   
                                   and K. Arcand   
      
      Explanation: What do the famous Eagle Nebula star pillars look like in   
      X-ray light? To find out, NASA's orbiting Chandra X-ray Observatory   
      peered in and through these interstellar mountains of star formation.   
      It was found that in M16 the dust pillars themselves do not emit many   
      X-rays, but a lot of small-but-bright X-ray sources became evident.   
      These sources are shown as bright dots on the featured image which is a   
      composite of exposures from Chandra (X-rays), XMM (X-rays), JWST   
      (infrared), Spitzer (infrared), Hubble (visible), and the VLT   
      (visible). What stars produce these X-rays remains a topic of research,   
      but some are hypothesized to be hot, recently-formed, low-mass stars,   
      while others are thought to be hot, older, high-mass stars. These X-ray   
      hot stars are scattered around the frame -- the previously identified   
      Evaporating Gaseous Globules (EGGS) seen in visible light are not   
      currently hot enough to emit X-rays.   
      
                       Tomorrow's picture: undersea overhead   
        __________________________________________________________________   
      
          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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