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.

                                2025 July 16
    [2]A deep image of the Rosette Nebula is shown along with a field of
     stars. As many color filters were used, the flowery nebula takes on
   many colors with blue in the center, yellow and orange around the blue,
       and red around the outside. Please see the explanation for more
                            detailed information.

                        The Rosette Nebula from DECam
   Image Credit: [3]CTIO, [4]NOIRLab, [5]DOE, [6]NSF, [7]AURA; Processing:
     [8]T. A. Rector ([9]U. Alaska Anchorage), D. de Martin ([10]NSF’s
                        [11]NOIRLab) & [12]M. Zamani

   Explanation: Would the [13]Rosette Nebula by any other [14]name look as
   sweet? The bland [15]New General Catalog designation of [16]NGC 2237
   doesn't appear to diminish the appearance of [17]this flowery
   [18]emission nebula, as captured by the [19]Dark Energy Camera (DECam)
   on the [20]Blanco 4-meter telescope at the [21]NSF's [22]Cerro Tololo
   Inter-American Observatory in [23]Chile. Inside the nebula lies an
   [24]open cluster of bright young stars designated [25]NGC 2244. These
   stars [26]formed about four million years ago from the nebular material
   and their [27]stellar winds are [28]clearing a hole in the nebula's
   center, insulated by a layer of [29]dust and hot gas. [30]Ultraviolet
   light from the hot cluster stars causes the surrounding nebula to
   [31]glow. The [32]Rosette Nebula spans about 100 [33]light-years
   across, lies [34]about 5000 light-years away, and can be seen with a
   small telescope towards the [35]constellation of the Unicorn
   ([36]Monoceros).

    Open Science: [37]Browse 3,700+ codes in the Astrophysics Source Code
                                   Library
                           Tomorrow's picture: 3I
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    Authors & editors: [49]Robert Nemiroff ([50]MTU) & [51]Jerry Bonnell
                                 ([52]UMCP)
          NASA Official: Amber Straughn [53]Specific rights apply.
            [54]NASA Web Privacy, [55]Accessibility, [56]Notices;
                A service of: [57]ASD at [58]NASA / [59]GSFC,
                         [60]NASA Science Activation
                           & [61]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2507/Rosette_Decam_4000.jpg
   3. https://noirlab.edu/public/programs/ctio/
   4. https://noirlab.edu/
   5. https://www.energy.gov/
   6. https://www.nsf.gov/
   7. https://www.aura-astronomy.org/
   8. http://aftar.uaa.alaska.edu/
   9. https://www.uaa.alaska.edu/
  10. https://www.nsf.gov/
  11. https://noirlab.edu/
  12. https://mahdizamani.com/about
  13. https://en.wikipedia.org/wiki/Rosette_Nebula
  14. http://www.bartleby.com/100/138.28.22.html
  15. http://en.wikipedia.org/wiki/New_General_Catalogue
  16. http://www.google.com/images?hl=en&biw=1024&bih=974&gbv=2&tbs=isch:1&sa=1&q=+site:apod.nasa.gov+Rosette&aq=f&aqi=&aql=&oq=
  17. https://noirlab.edu/public/images/noirlab2424a/
  18. https://apod.nasa.gov/apod/emission_nebulae.html
  19. https://noirlab.edu/public/programs/ctio/victor-blanco-4m-telescope/decam/
  20. https://noirlab.edu/public/programs/ctio/victor-blanco-4m-telescope/
  21. https://noirlab.edu/public/
  22. https://noirlab.edu/public/programs/ctio/
  23. https://en.wikipedia.org/wiki/Chile
  24. https://apod.nasa.gov/apod/open_clusters.html
  25. https://apod.nasa.gov/apod/ap000822.html
  26. https://ui.adsabs.harvard.edu/abs/1993ApJ...414..664K/abstract
  27. https://apod.nasa.gov/apod/ap000318.html
  28. https://youtu.be/Cn2g_8n1AsM
  29. https://apod.nasa.gov/apod/ap030706.html
  30. https://science.nasa.gov/ems/10_ultravioletwaves/
  31. http://www.youtube.com/watch?v=0brmw8sP-Js
  32. https://apod.nasa.gov/apod/ap000111.html
  33. https://science.nasa.gov/exoplanets/what-is-a-light-year/
  34. https://ui.adsabs.harvard.edu/abs/2000A&A...358..553H/abstract
  35. https://spaceplace.nasa.gov/constellations/
  36. http://chandra.harvard.edu/photo/constellations/monoceros.html
  37. https://ascl.net/code/all
  38. https://apod.nasa.gov/apod/ap250715.html
  39. https://apod.nasa.gov/apod/archivepix.html
  40. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  41. https://apod.nasa.gov/apod/lib/aptree.html
  42. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  43. https://apod.nasa.gov/apod/calendar/allyears.html
  44. https://apod.com/feed.rss
  45. https://apod.nasa.gov/apod/lib/edlinks.html
  46. https://apod.nasa.gov/apod/lib/about_apod.html
  47. https://asterisk.apod.com/discuss_apod.php?date=250716
  48. https://apod.nasa.gov/apod/ap250717.html
  49. http://www.phy.mtu.edu/faculty/Nemiroff.html
  50. http://www.phy.mtu.edu/
  51. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  52. http://www.astro.umd.edu/
  53. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  54. https://www.nasa.gov/about/highlights/HP_Privacy.html
  55. https://www.nasa.gov/general/accessibility/
  56. https://www.nasa.gov/privacy/
  57. https://astrophysics.gsfc.nasa.gov/
  58. https://www.nasa.gov/
  59. https://www.nasa.gov/centers/goddard/
  60. https://science.nasa.gov/learners
  61. http://www.mtu.edu/