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 22
   [2]The featured image shows a dark nebula complex involving thick dust
                      appearing brown and making a big

                           Chamaeleon Dark Nebulas
                   Image Credit & Copyright: [3]Chang Lee

   Explanation: Sometimes the dark dust of interstellar space has an
   angular elegance. Such is the case toward the far-south
   [4]constellation of Chamaeleon. Normally [5]too faint to see, dark dust
   is best known for blocking visible light from stars and galaxies behind
   it. In [6]this 36.6-hour exposure, however, [7]the dust is seen mostly
   in light of its own, with its strong red and near-[8]infrared colors
   creating a brown hue. Contrastingly blue, the bright star [9]Beta
   Chamaeleontis is visible on the upper right, with the dust that
   surrounds it preferentially reflecting blue light from its primarily
   blue-white color. All of the pictured stars and dust occur in our own
   [10]Milky Way Galaxy with one [11]notable exception: the white spot
   just [12]below Beta Chamaeleontis is the galaxy [13]IC 3104 which lies
   far in the distance. [14]Interstellar dust is mostly created in the
   cool atmospheres of [15]giant stars and dispersed into space by stellar
   light, [16]stellar winds, and [17]stellar explosions such as
   [18]supernovas.

                    Tomorrow's picture: Chandra Crab (25)
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    Authors & editors: [30]Robert Nemiroff ([31]MTU) & [32]Jerry Bonnell
                                 ([33]UMCP)
          NASA Official: Amber Straughn [34]Specific rights apply.
            [35]NASA Web Privacy, [36]Accessibility, [37]Notices;
                A service of: [38]ASD at [39]NASA / [40]GSFC,
                         [41]NASA Science Activation
                           & [42]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2407/VeeChamaeleon_Lee_6098.jpg
   3. https://www.astrobin.com/users/Chang-Lee/
   4. https://en.wikipedia.org/wiki/Chamaeleon
   5. https://apod.nasa.gov/apod/ap180628.html
   6. https://www.astrobin.com/rlr0m9/
   7. https://www.flickr.com/photos/hiroc/47807534932
   8. https://science.nasa.gov/ems/07_infraredwaves
   9. https://en.wikipedia.org/wiki/Beta_Chamaeleontis
  10. https://science.nasa.gov/resource/the-milky-way-galaxy/
  11. https://static.onecms.io/wp-content/uploads/sites/20/2021/09/28/startled-cat-5.jpg
  12. http://www.werbeagentur.org/oldwexi/gallery.html
  13. https://theskylive.com/sky/deepsky/ic3104-object
  14. https://astronomy.swin.edu.au/cosmos/d/Dust+Grain
  15. https://en.wikipedia.org/wiki/Red_giant
  16. https://apod.nasa.gov/apod/ap000318.html
  17. https://en.wikipedia.org/wiki/List_of_stellar_explosion_types
  18. https://www.science.org/content/article/interstellar-dust-may-come-supernovae-after-all
  19. https://apod.nasa.gov/apod/ap240721.html
  20. https://apod.nasa.gov/apod/archivepix.html
  21. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  22. https://apod.nasa.gov/apod/lib/aptree.html
  23. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  24. https://apod.nasa.gov/apod/calendar/allyears.html
  25. https://apod.com/feed.rss
  26. https://apod.nasa.gov/apod/lib/edlinks.html
  27. https://apod.nasa.gov/apod/lib/about_apod.html
  28. https://asterisk.apod.com/discuss_apod.php?date=240722
  29. https://apod.nasa.gov/apod/ap240723.html
  30. http://www.phy.mtu.edu/faculty/Nemiroff.html
  31. http://www.phy.mtu.edu/
  32. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  33. http://www.astro.umd.edu/
  34. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  35. https://www.nasa.gov/about/highlights/HP_Privacy.html
  36. https://www.nasa.gov/general/accessibility/
  37. https://www.nasa.gov/privacy/
  38. https://astrophysics.gsfc.nasa.gov/
  39. https://www.nasa.gov/
  40. https://www.nasa.gov/centers/goddard/
  41. https://science.nasa.gov/learners
  42. http://www.mtu.edu/