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.

                                2022 June 27
      [2]The featured image shows expansive Gum Nebula, glowing in red,
    behind a landscape with a wooden hut and snowy mountains. the unusual
       light Please see the explanation for more detailed information.

                     The Gum Nebula over Snowy Mountains
                    Image Credit & Copyright: [3]Wang Jin

   Explanation: The Gum Nebula is so large and close it is actually
   [4]hard to see. This interstellar expanse of glowing [5]hydrogen gas
   frequently evades notice because it spans 35 degrees -- over 70 full
   Moons -- while much of it is quite dim. This featured spectacular
   90-degree wide mosaic, however, was designed to be both wide and deep
   enough to bring up [6]the Gum -- visible in red on the right. The image
   was acquired late last year with both the foreground -- including
   [7]Haba Snow Mountain -- and the background -- including the [8]Milky
   Way's central band -- captured by the same camera and from the same
   location in [9]Shangri-La, [10]Yunnan, [11]China. The Gum Nebula is so
   close that we are only about 450 [12]light-years from the front edge,
   while about 1,500 light-years from the back edge. Named for a cosmic
   cloud hunter, Australian astronomer [13]Colin Stanley Gum (1924-1960),
   the origin of this [14]complex nebula is still being debated. A leading
   theory for the origin of the [15]Gum Nebula is that it is the remnant
   of a million year-old [16]supernova explosion, while a competing theory
   holds that [17]the Gum is a [18]molecular cloud shaped over eons by
   multiple supernovas and the outflowing [19]winds of several massive
   stars.

                       Tomorrow's picture: moon planet
     __________________________________________________________________

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    Authors & editors: [31]Robert Nemiroff ([32]MTU) & [33]Jerry Bonnell
                                 ([34]UMCP)
          NASA Official: Phillip Newman [35]Specific rights apply.
              [36]NASA Web Privacy Policy and Important Notices
                A service of: [37]ASD at [38]NASA / [39]GSFC
                           & [40]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2206/GumMountain_WangJin_2400.jpg
   3. mailto: royalk86 at gmail dot com
   4. https://media.istockphoto.com/photos/weimaraner-with-head-cocked-picture-id509119713?k=20&m=509119713&s=612x612&w=0&h=gsZImHt0_RED1LL2W05Klj1Rz8yuavU9SFNLRtM95c4=
   5. https://en.wikipedia.org/wiki/Hydrogen
   6. https://en.wikipedia.org/wiki/Gum_Nebula
   7. https://youtu.be/pt4hg-wS2Wo
   8. https://apod.nasa.gov/apod/ap070930.html
   9. https://youtu.be/MHJLoTd69gg
  10. https://en.wikipedia.org/wiki/Yunnan
  11. https://en.wikipedia.org/wiki/China
  12. https://spaceplace.nasa.gov/light-year/en/
  13. https://en.wikipedia.org/wiki/Colin_Stanley_Gum
  14. https://ui.adsabs.harvard.edu/abs/1993A&A...280..231S/abstract
  15. https://apod.nasa.gov/apod/ap180524.html
  16. https://youtu.be/aysiMbgml5g
  17. https://ui.adsabs.harvard.edu/abs/2022MNRAS.511.4500Y/abstract
  18. https://apod.nasa.gov/apod/ap201122.html
  19. https://apod.nasa.gov/apod/ap200121.html
  20. https://apod.nasa.gov/apod/ap220626.html
  21. https://apod.nasa.gov/apod/archivepix.html
  22. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  23. https://apod.nasa.gov/apod/lib/aptree.html
  24. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  25. https://apod.nasa.gov/apod/calendar/allyears.html
  26. https://apod.nasa.gov/apod.rss
  27. https://apod.nasa.gov/apod/lib/edlinks.html
  28. https://apod.nasa.gov/apod/lib/about_apod.html
  29. http://asterisk.apod.com/discuss_apod.php?date=220627
  30. https://apod.nasa.gov/apod/ap220628.html
  31. http://www.phy.mtu.edu/faculty/Nemiroff.html
  32. http://www.phy.mtu.edu/
  33. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  34. http://www.astro.umd.edu/
  35. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  36. https://www.nasa.gov/about/highlights/HP_Privacy.html
  37. https://astrophysics.gsfc.nasa.gov/
  38. https://www.nasa.gov/
  39. https://www.nasa.gov/centers/goddard/
  40. http://www.mtu.edu/