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.

                                2024 July 10
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                            A Sagittarius Triplet
                Image Credit & [3]Copyright: [4]Andy Ermolli

   Explanation: These three bright nebulae are often featured on
   telescopic tours of the constellation [5]Sagittarius and the crowded
   starfields of the [6]central Milky Way. In fact, 18th century cosmic
   tourist [7]Charles Messier cataloged two of them; [8]M8, the large
   nebula above center, and colorful [9]M20 below and left in the frame.
   The third emission region includes [10]NGC 6559, right of M8 and
   separated from the larger nebula by a dark dust lane. All three are
   stellar nurseries about five thousand light-years or so distant. Over a
   hundred light-years across the expansive M8 is also known as the Lagoon
   Nebula. M20's popular moniker is the Trifid. Glowing hydrogen gas
   creates the dominant red color of the emission nebulae. But for
   striking contrast, blue hues in the Trifid are due to dust
   [11]reflected starlight. The broad [12]interstellar skyscape spans
   almost 4 degrees or 8 full moons on the sky.

                     Tomorrow's picture: pixels in space
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    Authors & editors: [24]Robert Nemiroff ([25]MTU) & [26]Jerry Bonnell
                                 ([27]UMCP)
          NASA Official: Amber Straughn [28]Specific rights apply.
               [29]NASA Web Privacy, [30]Accessibility Notices
                A service of: [31]ASD at [32]NASA / [33]GSFC,
                         [34]NASA Science Activation
                           & [35]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2407/sagittariusTri.jpg
   3. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
   4. https://www.instagram.com/andyermolli/
   5. http://www.hawastsoc.org/deepsky/sgr/index.html
   6. https://apod.nasa.gov/apod/ap161110.html
   7. https://www.nasa.gov/content/explore-the-night-sky-hubble-s-messier-catalog-bio
   8. https://apod.nasa.gov/apod/ap160909.html
   9. https://apod.nasa.gov/apod/ap170628.html
  10. https://apod.nasa.gov/apod/ap040629.html
  11. https://apod.nasa.gov/apod/ap011228.html
  12. https://www.instagram.com/andyermolli/p/C9GnqlvJCc5/
  13. https://apod.nasa.gov/apod/ap240709.html
  14. https://apod.nasa.gov/apod/archivepix.html
  15. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  16. https://apod.nasa.gov/apod/lib/aptree.html
  17. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  18. https://apod.nasa.gov/apod/calendar/allyears.html
  19. https://apod.nasa.gov/apod.rss
  20. https://apod.nasa.gov/apod/lib/edlinks.html
  21. https://apod.nasa.gov/apod/lib/about_apod.html
  22. http://asterisk.apod.com/discuss_apod.php?date=240710
  23. https://apod.nasa.gov/apod/ap240711.html
  24. http://www.phy.mtu.edu/faculty/Nemiroff.html
  25. http://www.phy.mtu.edu/
  26. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  27. http://www.astro.umd.edu/
  28. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  29. https://www.nasa.gov/about/highlights/HP_Privacy.html
  30. https://www.nasa.gov/general/accessibility/
  31. https://astrophysics.gsfc.nasa.gov/
  32. https://www.nasa.gov/
  33. https://www.nasa.gov/centers/goddard/
  34. https://science.nasa.gov/learners
  35. http://www.mtu.edu/