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.

                               2022 January 17
   [2]The featured image shows a dark nebula complex involving thick dust.
          Please see the explanation for more detailed information.

                           Chamaeleon Dark Nebulas
        Image Credit & Copyright: [3]Jarmo Ruuth, [4]Telescope Live,
                       [5]Heaven's Mirror Observatory

   Explanation: Sometimes the dark dust of interstellar space has an
   angular elegance. Such is the case toward the far-south
   [6]constellation of Chamaeleon. Normally [7]too faint to see, dark dust
   is best known for blocking visible light from stars and galaxies behind
   it. In [8]this four-hour exposure, however, [9]the dust is seen mostly
   in light of its own, with its strong red and near-[10]infrared colors
   giving creating a brown hue. Contrastingly blue, the bright star
   [11]Beta Chamaeleontis is visible just to the right of center, with the
   dust that surrounds it preferentially reflecting blue light from its
   primarily blue-white color. All of the [12]pictured stars and dust
   occur in our own Milky Way Galaxy with -- but one [13]notable
   exception: the white spot just [14]below Beta Chamaeleontis is the
   galaxy IC 3104 which lies far in the distance. [15]Interstellar dust is
   mostly created in the cool atmospheres of [16]giant stars and dispersed
   into space by stellar light, [17]stellar winds, and [18]stellar
   explosions such as [19]supernovas.

                  Tomorrow's picture: icons over australia
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    Authors & editors: [31]Robert Nemiroff ([32]MTU) & [33]Jerry Bonnell
                                 ([34]UMCP)
          NASA Official: Phillip Newman [35]Specific rights apply.
              [36]NASA Web Privacy Policy and Important Notices
                A service of: [37]ASD at [38]NASA / [39]GSFC
                           & [40]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2201/DarkNebulaVd_HmoRuuth_4096.jpg
   3. https://www.instagram.com/jarmoruuth/
   4. https://telescope.live/about
   5. https://help.telescope.live/hc/en-us/articles/360002914138-Heaven-s-Mirror-Observatory-Australia-AUS-
   6. https://en.wikipedia.org/wiki/Chamaeleon
   7. https://apod.nasa.gov/apod/ap180628.html
   8. https://www.flickr.com/photos/29679880@N05/51806716079/
   9. https://www.flickr.com/photos/hiroc/47807534932
  10. https://science.nasa.gov/ems/07_infraredwaves
  11. https://en.wikipedia.org/wiki/Beta_Chamaeleontis
  12. http://asterisk.apod.com/viewtopic.php?f=29&t=42126&start=25#p319709
  13. https://static.onecms.io/wp-content/uploads/sites/20/2021/09/28/startled-cat-5.jpg
  14. http://www.werbeagentur.org/oldwexi/gallery.html
  15. https://astronomy.swin.edu.au/cosmos/d/Dust+Grain
  16. https://en.wikipedia.org/wiki/Red_giant
  17. https://apod.nasa.gov/apod/ap000318.html
  18. https://en.wikipedia.org/wiki/List_of_stellar_explosion_types
  19. https://www.science.org/content/article/interstellar-dust-may-come-supernovae-after-all
  20. https://apod.nasa.gov/apod/ap220116.html
  21. https://apod.nasa.gov/apod/archivepix.html
  22. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  23. https://apod.nasa.gov/apod/lib/aptree.html
  24. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  25. https://apod.nasa.gov/apod/calendar/allyears.html
  26. https://apod.nasa.gov/apod.rss
  27. https://apod.nasa.gov/apod/lib/edlinks.html
  28. https://apod.nasa.gov/apod/lib/about_apod.html
  29. http://asterisk.apod.com/discuss_apod.php?date=220117
  30. https://apod.nasa.gov/apod/ap220118.html
  31. http://www.phy.mtu.edu/faculty/Nemiroff.html
  32. http://www.phy.mtu.edu/
  33. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  34. http://www.astro.umd.edu/
  35. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  36. https://www.nasa.gov/about/highlights/HP_Privacy.html
  37. https://astrophysics.gsfc.nasa.gov/
  38. https://www.nasa.gov/
  39. https://www.nasa.gov/centers/goddard/
  40. http://www.mtu.edu/