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

                           Lynds Dark Nebula 1251
              Image Credit & [3]Copyright: [4]Cristiano Gualco

   Explanation: Stars are forming in Lynds Dark Nebula ([5]LDN) 1251.
   About 1,000 light-years away and drifting above the plane of our Milky
   Way galaxy, LDN 1251 is also less appetizingly known as "The Rotten
   Fish Nebula." The dusty molecular cloud is part of a complex of dark
   nebulae mapped toward the [6]Cepheus flare region. [7]Across the
   spectrum, astronomical explorations of the obscuring interstellar
   clouds reveal energetic shocks and outflows associated with newborn
   stars, including the telltale reddish glow from scattered
   [8]Herbig-Haro objects hiding in the image. Distant background galaxies
   also lurk in the scene, almost buried behind the dusty expanse. This
   [9]alluring telescopic frame spans almost three full moons on the sky.
   That [10]corresponds to over 25 light-years at the estimated distance
   of LDN 1251.

                     Tomorrow's picture: pixels in space
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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/2507/LDN1251gualco2048.JPG
   3. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
   4. https://app.astrobin.com/u/CristianoGualco#gallery
   5. http://adsabs.harvard.edu/abs/1962ApJS....7....1L
   6. https://arxiv.org/abs/0809.4761
   7. https://arxiv.org/abs/1503.02934
   8. https://www.nasa.gov/image-feature/awakening-newborn-stars
   9. https://app.astrobin.com/u/CristianoGualco?i=qyrq8r#gallery
  10. https://chandra.harvard.edu/photo/scale_distance.html
  11. https://apod.nasa.gov/apod/ap250709.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=250710
  21. https://apod.nasa.gov/apod/ap250711.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/