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.

                               2025 August 29
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                          A Dark Veil in Ophiuchus
              Image Credit & [3]Copyright: [4]Katelyn Beecroft

   Explanation: The diffuse [5]hydrogen-alpha glow of emission region
   Sh2-27 fills this cosmic scene. The field of view spans nearly 3
   degrees across the nebula-rich constellation Ophiuchus toward the
   [6]central Milky Way. A Dark Veil of wispy interstellar dust clouds
   draped across the foreground is chiefly identified as LDN 234 and LDN
   204 from the 1962 [7]Catalog of Dark Nebulae by American astronomer
   [8]Beverly Lynds. Sh2-27 itself is the large but faint HII region
   surrounding [9]runaway O-type star Zeta Ophiuchi. Along with the
   [10]Zeta Oph HII region, LDN 234 and LDN 204 are likely 500 or so
   light-years away. At that distance, this telescopic frame would be
   about 25 light-years wide.

                      Tomorrow's picture: light-weekend
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    Authors & editors: [22]Robert Nemiroff ([23]MTU) & [24]Jerry Bonnell
                                 ([25]UMCP)
          NASA Official: Amber Straughn [26]Specific rights apply.
            [27]NASA Web Privacy, [28]Accessibility, [29]Notices;
                A service of: [30]ASD at [31]NASA / [32]GSFC,
                         [33]NASA Science Activation
                           & [34]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2508/DarkVeil_v2p2048.jpeg
   3. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
   4. https://app.astrobin.com/u/kates.universe
   5. https://en.wikipedia.org/wiki/Hydrogen-alpha
   6. https://apod.nasa.gov/apod/ap250527.html
   7. https://apod.nasa.gov/apod/
   8. https://skyandtelescope.org/astronomy-news/beverly-turner-lynds-1929-2024/
   9. https://apod.nasa.gov/apod/ap240204.html
  10. https://ui.adsabs.harvard.edu/abs/2015ApJ...800..132C/abstract
  11. https://apod.nasa.gov/apod/ap250828.html
  12. https://apod.nasa.gov/apod/archivepix.html
  13. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  14. https://apod.nasa.gov/apod/lib/aptree.html
  15. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  16. https://apod.nasa.gov/apod/calendar/allyears.html
  17. https://apod.com/feed.rss
  18. https://apod.nasa.gov/apod/lib/edlinks.html
  19. https://apod.nasa.gov/apod/lib/about_apod.html
  20. https://asterisk.apod.com/discuss_apod.php?date=250829
  21. https://apod.nasa.gov/apod/ap250830.html
  22. http://www.phy.mtu.edu/faculty/Nemiroff.html
  23. http://www.phy.mtu.edu/
  24. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  25. http://www.astro.umd.edu/
  26. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  27. https://www.nasa.gov/about/highlights/HP_Privacy.html
  28. https://www.nasa.gov/general/accessibility/
  29. https://www.nasa.gov/privacy/
  30. https://astrophysics.gsfc.nasa.gov/
  31. https://www.nasa.gov/
  32. https://www.nasa.gov/centers/goddard/
  33. https://science.nasa.gov/learners
  34. http://www.mtu.edu/