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

                       LDN 673: Dark Clouds in Aquila
    Image Credit & [3]Copyright: Frank Sackenheim, Josef Poepsel, Stefan
                   Binnewies ([4]Capella Observatory Team)

   Explanation: [5]Part of a dark expanse that splits the crowded plane of
   our Milky Way galaxy, the Aquila Rift arcs through planet Earth's skies
   [6]near bright star Altair. In eerie silhouette against the Milky Way's
   faint [7]starlight, its dusty molecular clouds likely contain raw
   material to form hundreds of thousands of stars and [8]astronomers
   search the dark clouds for telltale signs of star birth. [9]This
   telescopic close-up looks toward the region at a fragmented Aquila dark
   cloud complex identified as LDN 673, stretching across a field of view
   slightly wider than the full moon. In the scene, visible indications of
   [10]energetic outflows associated [11]with young stars include the
   small red tinted nebulosity RNO 109 above and right of center, and
   Herbig-Haro object [12]HH32 below. [13]These dark clouds might look
   scary, but they're estimated to be some 600 light-years away. At that
   distance, this field of view spans about 7 light-years.

                 Tomorrow's picture: a dark and spooky night
     __________________________________________________________________

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    Authors & editors: [25]Robert Nemiroff ([26]MTU) & [27]Jerry Bonnell
                                 ([28]UMCP)
          NASA Official: Phillip Newman [29]Specific rights apply.
              [30]NASA Web Privacy Policy and Important 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/2210/LDN673.jpg
   3. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
   4. http://www.capella-observatory.com/Contact.htm
   5. https://apod.nasa.gov/apod/ap100625.html
   6. https://en.wikipedia.org/wiki/Aquila_%28constellation%29
   7. https://apod.nasa.gov/apod/ap090613.html
   8. https://arxiv.org/abs/1712.00305
   9. http://www.capella-observatory.com/ImageHTMLs/DiffuseNebula/LDN673.htm
  10. https://apod.nasa.gov/apod/ap110905.html
  11. https://apod.nasa.gov/apod/ap111027.html
  12. http://www.spacetelescope.org/images/opo9935a/
  13. https://exoplanets.nasa.gov/alien-worlds/galaxy-of-horrors/
  14. https://apod.nasa.gov/apod/ap221028.html
  15. https://apod.nasa.gov/apod/archivepix.html
  16. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  17. https://apod.nasa.gov/apod/lib/aptree.html
  18. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  19. https://apod.nasa.gov/apod/calendar/allyears.html
  20. https://apod.nasa.gov/apod.rss
  21. https://apod.nasa.gov/apod/lib/edlinks.html
  22. https://apod.nasa.gov/apod/lib/about_apod.html
  23. http://asterisk.apod.com/discuss_apod.php?date=221029
  24. https://apod.nasa.gov/apod/ap221030.html
  25. http://www.phy.mtu.edu/faculty/Nemiroff.html
  26. http://www.phy.mtu.edu/
  27. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  28. http://www.astro.umd.edu/
  29. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  30. https://www.nasa.gov/about/highlights/HP_Privacy.html
  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/