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 September 17
    [2]A starfield is shown with a a bright orange nebula in the center.
   The nebula is filamentary and takes up much of the bottom and middle of
   the frame. The top is most dark with some bright stars. Please see the
                 explanation for more detailed information.

                       Melotte 15 in the Heart Nebula
                Image Credit & Copyright: [3]Richard McInnis

   Explanation: Cosmic clouds form [4]fantastic shapes in the central
   regions of emission nebula IC 1805. The clouds are sculpted by stellar
   winds and radiation from massive hot stars in the nebula's [5]newborn
   star cluster, [6]Melotte 15. About 1.5 million years young, the cluster
   stars are scattered in this [7]colorful skyscape, along with [8]dark
   dust clouds in silhouette against glowing atomic gas. A composite of
   narrowband and broadband telescopic images, the view spans about 15
   light-years and includes emission from ionized [9]hydrogen, [10]sulfur,
   and [11]oxygen atoms mapped to green, red, and blue hues in the popular
   [12]Hubble Palette. [13]Wider field images reveal that IC 1805's
   simpler, overall outline suggests its popular name - the [14]Heart
   Nebula. IC 1805 is located about 7,500 [15]light years away toward the
   [16]boastful constellation [17]Cassiopeia.

                    Tomorrow's picture: supernova surfer
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    Authors & editors: [29]Robert Nemiroff ([30]MTU) & [31]Jerry Bonnell
                                 ([32]UMCP)
          NASA Official: Amber Straughn [33]Specific rights apply.
            [34]NASA Web Privacy, [35]Accessibility, [36]Notices;
                A service of: [37]ASD at [38]NASA / [39]GSFC,
                         [40]NASA Science Activation
                           & [41]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2409/HeartMelotte_McInnis_1513.jpg
   3. https://www.astrobin.com/users/rmcinnis1/
   4. https://apod.nasa.gov/apod/ap100716.html
   5. http://chandra.harvard.edu/edu/formal/stellar_ev/story/index9.html
   6. https://en.wikipedia.org/wiki/Melotte_catalogue
   7. https://www.astrobin.com/fokpl4/
   8. https://apod.nasa.gov/apod/ap240822.html
   9. https://spinoff.nasa.gov/Spinoff2016/ps_5.html
  10. https://en.wikipedia.org/wiki/Sulfur
  11. https://periodic.lanl.gov/8.shtml
  12. https://www.skyatnightmagazine.com/astrophotography/astrophoto-tips/create-hubble-palette-astro-images-astro-pixel-processor
  13. https://apod.nasa.gov/apod/ap220214.html
  14. https://apod.nasa.gov/apod/ap190911.html
  15. https://spaceplace.nasa.gov/light-year/en/
  16. https://media.istockphoto.com/id/159176199/photo/cat.jpg?s=612x612&w=0&k=20&c=U34AGa5EN0xuBbrzpSygVHcR7RHuwWAivyH7hpHw_m0=
  17. http://en.wikipedia.org/wiki/Cassiopeia_(constellation)
  18. https://apod.nasa.gov/apod/ap240916.html
  19. https://apod.nasa.gov/apod/archivepix.html
  20. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  21. https://apod.nasa.gov/apod/lib/aptree.html
  22. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  23. https://apod.nasa.gov/apod/calendar/allyears.html
  24. https://apod.com/feed.rss
  25. https://apod.nasa.gov/apod/lib/edlinks.html
  26. https://apod.nasa.gov/apod/lib/about_apod.html
  27. https://asterisk.apod.com/discuss_apod.php?date=240917
  28. https://apod.nasa.gov/apod/ap240918.html
  29. http://www.phy.mtu.edu/faculty/Nemiroff.html
  30. http://www.phy.mtu.edu/
  31. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  32. http://www.astro.umd.edu/
  33. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  34. https://www.nasa.gov/about/highlights/HP_Privacy.html
  35. https://www.nasa.gov/general/accessibility/
  36. https://www.nasa.gov/privacy/
  37. https://astrophysics.gsfc.nasa.gov/
  38. https://www.nasa.gov/
  39. https://www.nasa.gov/centers/goddard/
  40. https://science.nasa.gov/learners
  41. http://www.mtu.edu/