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.

                                 2020 July 3
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                           Lynds Dark Nebula 1251
                Image Credit & [3]Copyright: [4]Ara Jerahian

   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, 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 seen in this sharp image. Distant background
   galaxies also lurk on the scene, buried behind the dusty expanse.
   [9]This alluring view imaged with a backyard telescope and broadband
   filters spans about two full moons on the sky, or 17 light-years at the
   estimated distance of LDN 1251.

                Tomorrow's picture: transient luminous events
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    Authors & editors: [21]Robert Nemiroff ([22]MTU) & [23]Jerry Bonnell
                                 ([24]UMCP)
          NASA Official: Phillip Newman [25]Specific rights apply.
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                A service of: [27]ASD at [28]NASA / [29]GSFC
                           & [30]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2007/ldn1251_jerahian.jpg
   3. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
   4. https://www.astrobin.com/users/jerahian/
   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://en.wikipedia.org/wiki/Herbig%E2%80%93Haro_object
   9. https://www.astrobin.com/lg85ah/?nc=user
  10. https://apod.nasa.gov/apod/ap200702.html
  11. https://apod.nasa.gov/apod/archivepix.html
  12. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  13. https://apod.nasa.gov/apod/lib/aptree.html
  14. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  15. https://apod.nasa.gov/apod/calendar/allyears.html
  16. https://apod.nasa.gov/apod.rss
  17. https://apod.nasa.gov/apod/lib/edlinks.html
  18. https://apod.nasa.gov/apod/lib/about_apod.html
  19. http://asterisk.apod.com/discuss_apod.php?date=200703
  20. https://apod.nasa.gov/apod/ap200704.html
  21. http://www.phy.mtu.edu/faculty/Nemiroff.html
  22. http://www.phy.mtu.edu/
  23. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  24. http://www.astro.umd.edu/
  25. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  26. https://www.nasa.gov/about/highlights/HP_Privacy.html
  27. https://astrophysics.gsfc.nasa.gov/
  28. https://www.nasa.gov/
  29. https://www.nasa.gov/centers/goddard/
  30. http://www.mtu.edu/