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 March 5
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                     The Light, the Dark, and the Dusty
                 Image Credit & [3]Copyright: [4]Casey Good

   Explanation: [5]This colorful skyscape spans about four full moons
   across nebula rich starfields along the plane of our Milky Way Galaxy
   in the royal northern constellation [6]Cepheus. Near the edge of the
   region's massive molecular cloud some 2,400 light-years away, bright
   reddish emission region [7]Sharpless (Sh) 155 is left of center, also
   known as the [8]Cave Nebula. About 10 light-years across the cosmic
   cave's bright walls of gas are ionized by ultraviolet light from the
   hot young stars around it. Dusty blue reflection nebulae, [9]like vdB
   155 at lower right, and dense obscuring clouds of dust also abound on
   the [10]interstellar canvas. Astronomical [11]explorations have
   revealed other dramatic signs of star formation, including the bright
   red fleck of [12]Herbig-Haro (HH) 168. Below center in the frame, the
   Herbig-Haro object emission is generated by energetic jets [13]from a
   newborn star.

                     Tomorrow's picture: pixels in space
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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]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2003/CaveNebulaHaRGB.jpg
   3. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
   4. http://www.good-astronomy.com/
   5. https://www.astrobin.com/836z0z/?nc=user
   6. http://earthsky.org/brightest-stars/star-errai-future-north-star
   7. http://adsabs.harvard.edu/abs/1953ApJ...118..362S
   8. https://apod.nasa.gov/apod/ap170323.html
   9. http://adsabs.harvard.edu/abs/1966AJ.....71..990V
  10. https://www.nebulaphotos.com/img/sh2-155-annotated.jpg
  11. https://arxiv.org/abs/0909.5326
  12. http://en.wikipedia.org/wiki/Herbig–Haro_object
  13. http://heritage.stsci.edu/1999/35/index.html
  14. https://apod.nasa.gov/apod/ap200304.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=200305
  24. https://apod.nasa.gov/apod/ap200306.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. http://www.mtu.edu/