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 16
   [2]A starfield is shown featuring many pillars of interstellar gas and
       dust, mostly in the center. Please see the explanation for more
                            detailed information.

                              Cometary Globules
         Image Credit & Copyright: [3]Mark Hanson & [4]Martin Pugh,
                          [5]Observatorio El Sauce

   Explanation: What are these unusual interstellar structures?
   Bright-rimmed, flowing shapes gather near the center of [6]this rich
   starfield toward the borders of the nautical southern [7]constellations
   Pupis and Vela. Composed of interstellar gas and dust, the grouping of
   light-year sized cometary globules is about 1300 [8]light-years
   distant. Energetic ultraviolet light from nearby hot stars [9]has
   molded the globules and ionized their bright rims. [10]The globules
   also stream away from the [11]Vela supernova remnant which may have
   influenced their swept-back shapes. Within them, cores of cold gas and
   dust are likely [12]collapsing to form low mass stars, whose formation
   will ultimately cause the [13]globules to disperse. In fact, cometary
   globule CG 30 (on the upper left) sports a small reddish glow near its
   head, [14]a telltale sign of energetic jets from a star in the early
   stages [15]of formation.

                      Tomorrow's picture: volcanic sky
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    Authors & editors: [27]Robert Nemiroff ([28]MTU) & [29]Jerry Bonnell
                                 ([30]UMCP)
          NASA Official: Amber Straughn [31]Specific rights apply.
            [32]NASA Web Privacy, [33]Accessibility, [34]Notices;
                A service of: [35]ASD at [36]NASA / [37]GSFC,
                         [38]NASA Science Activation
                           & [39]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2407/CometaryGlobs_Pugh_4692.jpg
   3. https://www.hansonastronomy.com/bio
   4. https://www.martinpughastrophotography.space/about
   5. https://obstech.cl/
   6. https://www.hansonastronomy.com/cg-30-cometary-globule
   7. http://en.wikipedia.org/wiki/Argo_Navis
   8. https://spaceplace.nasa.gov/light-year/
   9. https://apod.nasa.gov/apod/ap071215.html
  10. http://arxiv.org/abs/astro-ph/0502285
  11. https://apod.nasa.gov/apod/ap190110.html
  12. https://pbs.twimg.com/media/BUCOEePIcAAht9h.jpg
  13. https://apod.nasa.gov/apod/ap230104.html
  14. https://ui.adsabs.harvard.edu/abs/1990MNRAS.242..419S/abstract
  15. https://science.nasa.gov/mission/hubble/science/science-highlights/exploring-the-birth-of-stars/
  16. https://apod.nasa.gov/apod/ap240715.html
  17. https://apod.nasa.gov/apod/archivepix.html
  18. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  19. https://apod.nasa.gov/apod/lib/aptree.html
  20. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  21. https://apod.nasa.gov/apod/calendar/allyears.html
  22. https://apod.com/feed.rss
  23. https://apod.nasa.gov/apod/lib/edlinks.html
  24. https://apod.nasa.gov/apod/lib/about_apod.html
  25. https://asterisk.apod.com/discuss_apod.php?date=240716
  26. https://apod.nasa.gov/apod/ap240717.html
  27. http://www.phy.mtu.edu/faculty/Nemiroff.html
  28. http://www.phy.mtu.edu/
  29. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  30. http://www.astro.umd.edu/
  31. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  32. https://www.nasa.gov/about/highlights/HP_Privacy.html
  33. https://www.nasa.gov/general/accessibility/
  34. https://www.nasa.gov/privacy/
  35. https://astrophysics.gsfc.nasa.gov/
  36. https://www.nasa.gov/
  37. https://www.nasa.gov/centers/goddard/
  38. https://science.nasa.gov/learners
  39. http://www.mtu.edu/