Astronomy Picture of the Day

   [1]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
   [2]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: [3]L. Frattare, J. Major, N.
                             Wolk, and K. Arcand

   Explanation: What do the famous [4]Eagle Nebula star pillars look like
   in X-ray light? To find out, NASA's orbiting [5]Chandra X-ray
   Observatory peered in and through these interstellar mountains of star
   formation. It was found that in [6]M16 the [7]dust pillars themselves
   do not emit many [8]X-rays, but a lot of small-but-bright X-ray sources
   became evident. These sources are shown as bright dots on the
   [9]featured image which is a composite of exposures from [10]Chandra
   ([11]X-rays), [12]XMM (X-rays), [13]JWST ([14]infrared), [15]Spitzer
   (infrared), [16]Hubble ([17]visible), and the [18]VLT (visible). What
   [19]stars produce these X-rays remains a [20]topic of research, but
   some are [21]hypothesized to be hot, [22]recently-formed, low-mass
   stars, while others are thought to be hot, older, high-mass stars.
   These [23]X-ray hot stars are scattered around the frame -- the
   [24]previously identified [25]Evaporating Gaseous Globules (EGGS) seen
   in [26]visible light are not currently hot enough to emit X-rays.

                    Tomorrow's picture: undersea overhead
     __________________________________________________________________

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    Authors & editors: [38]Robert Nemiroff ([39]MTU) & [40]Jerry Bonnell
                                 ([41]UMCP)
          NASA Official: Phillip Newman [42]Specific rights apply.
              [43]NASA Web Privacy Policy and Important Notices
                A service of: [44]ASD at [45]NASA / [46]GSFC,
                         [47]NASA Science Activation
                           & [48]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2307/EagleStars_NASA_960.jpg
   3. https://www.linkedin.com/in/lisafrattare
   4. https://apod.nasa.gov/apod/ap221004.html
   5. https://chandra.harvard.edu/
   6. https://apod.nasa.gov/apod/ap221206.html
   7. https://apod.nasa.gov/apod/ap201206.html
   8. https://science.nasa.gov/ems/11_xrays
   9. https://chandra.si.edu/photo/2023/chandrawebb2/more.html
  10. https://www.nasa.gov/mission_pages/chandra/main/index.html
  11. https://science.nasa.gov/ems/11_xrays
  12. https://www.cosmos.esa.int/web/xmm-newton
  13. https://webb.nasa.gov/
  14. https://science.nasa.gov/ems/07_infraredwaves
  15. https://www.nasa.gov/mission_pages/spitzer/main/index.html
  16. https://www.nasa.gov/mission_pages/hubble/main/index.html
  17. https://science.nasa.gov/ems/09_visiblelight
  18. https://www.eso.org/public/teles-instr/paranal-observatory/vlt/
  19. https://science.nasa.gov/astrophysics/focus-areas/how-do-stars-form-and-evolve
  20. https://ui.adsabs.harvard.edu/abs/2007ApJ...654..347L/abstract
  21. https://i.insider.com/55a67a7a371d22ce178b6624?width=1200&format=jpeg
  22. https://en.wikipedia.org/wiki/Young_stellar_object
  23. https://apod.nasa.gov/apod/ap010920.html
  24. https://apod.nasa.gov/apod/ap061022.html
  25. https://en.wikipedia.org/wiki/Evaporating_gaseous_globule
  26. https://apod.nasa.gov/apod/ap080915.html
  27. https://apod.nasa.gov/apod/ap230724.html
  28. https://apod.nasa.gov/apod/archivepix.html
  29. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  30. https://apod.nasa.gov/apod/lib/aptree.html
  31. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  32. https://apod.nasa.gov/apod/calendar/allyears.html
  33. https://apod.nasa.gov/apod.rss
  34. https://apod.nasa.gov/apod/lib/edlinks.html
  35. https://apod.nasa.gov/apod/lib/about_apod.html
  36. https://asterisk.apod.com/discuss_apod.php?date=230725
  37. https://apod.nasa.gov/apod/ap230726.html
  38. http://www.phy.mtu.edu/faculty/Nemiroff.html
  39. http://www.phy.mtu.edu/
  40. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  41. http://www.astro.umd.edu/
  42. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  43. https://www.nasa.gov/about/highlights/HP_Privacy.html
  44. https://astrophysics.gsfc.nasa.gov/
  45. https://www.nasa.gov/
  46. https://www.nasa.gov/centers/goddard/
  47. https://science.nasa.gov/learners
  48. http://www.mtu.edu/