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                        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.

                              2021 February 14
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                          Long Stem Rosette Nebula
          Image Credit & Copyright: [3]Adam Block & [4]Tim Puckett

   Explanation: Would the [5]Rosette Nebula by any other [6]name look as
   sweet? The bland [7]New General Catalog designation of [8]NGC 2237
   doesn't appear to diminish the appearance of [9]this flowery
   [10]emission nebula, at the top of the image, atop a [11]long stem of
   glowing hydrogen gas. Inside the nebula lies an [12]open cluster of
   bright young stars designated [13]NGC 2244. These stars [14]formed
   about four million years ago from the nebular material and their
   [15]stellar winds are clearing a hole in the nebula's center, insulated
   by a layer of [16]dust and hot gas. [17]Ultraviolet light from the hot
   cluster stars causes the surrounding nebula to [18]glow. The
   [19]Rosette Nebula spans about 100 [20]light-years across, lies
   [21]about 5000 light-years away, and can be seen with a small telescope
   towards the [22]constellation of the Unicorn ([23]Monoceros).

             Jump around the Universe: [24]Random APOD Generator
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    Authors & editors: [36]Robert Nemiroff ([37]MTU) & [38]Jerry Bonnell
                                 ([39]UMCP)
          NASA Official: Phillip Newman [40]Specific rights apply.
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                A service of: [42]ASD at [43]NASA / [44]GSFC
                           & [45]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2102/rosette_BlockPuckett_2918.jpg
   3. https://www.adamblockphotos.com/
   4. http://www.cometwatch.com/
   5. https://en.wikipedia.org/wiki/Rosette_Nebula
   6. https://www.bartleby.com/100/138.28.22.html
   7. https://en.wikipedia.org/wiki/New_General_Catalogue
   8. http://www.google.com/images?hl=en&biw=1024&bih=974&gbv=2&tbs=isch%3A1&sa=1&q=%2Bsite%3Aapod.nasa.gov+Rosette&aq=f&aqi=&aql=&oq=
   9. http://www.caelumobservatory.com/gallery/rosetteabtp.shtml
  10. https://apod.nasa.gov/apod/emission_nebulae.html
  11. https://www.rd.com/article/roses-popular-valentines-day/
  12. https://apod.nasa.gov/apod/open_clusters.html
  13. https://apod.nasa.gov/apod/ap000822.html
  14. https://ui.adsabs.harvard.edu/abs/1993ApJ...414..664K/abstract
  15. https://apod.nasa.gov/apod/ap000318.html
  16. https://apod.nasa.gov/apod/ap030706.html
  17. https://science.nasa.gov/ems/10_ultravioletwaves
  18. http://www.youtube.com/watch?v=0brmw8sP-Js
  19. https://apod.nasa.gov/apod/ap000111.html
  20. https://www.grc.nasa.gov/www/k-12/Numbers/Math/Mathematical_Thinking/how_long_is_a_light_year.htm
  21. https://ui.adsabs.harvard.edu/abs/2000A%26A...358..553H/abstract
  22. http://www.astro.wisc.edu/~dolan/constellations/extra/constellations.html
  23. http://chandra.harvard.edu/photo/constellations/monoceros.html
  24. http://apod.nasa.gov/apod/random_apod.html
  25. https://apod.nasa.gov/apod/ap210213.html
  26. https://apod.nasa.gov/apod/archivepix.html
  27. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  28. https://apod.nasa.gov/apod/lib/aptree.html
  29. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  30. https://apod.nasa.gov/apod/calendar/allyears.html
  31. https://apod.nasa.gov/apod.rss
  32. https://apod.nasa.gov/apod/lib/edlinks.html
  33. https://apod.nasa.gov/apod/lib/about_apod.html
  34. http://asterisk.apod.com/discuss_apod.php?date=210214
  35. https://apod.nasa.gov/apod/ap210215.html
  36. http://www.phy.mtu.edu/faculty/Nemiroff.html
  37. http://www.phy.mtu.edu/
  38. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  39. http://www.astro.umd.edu/
  40. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  41. https://www.nasa.gov/about/highlights/HP_Privacy.html
  42. https://astrophysics.gsfc.nasa.gov/
  43. https://www.nasa.gov/
  44. https://www.nasa.gov/centers/goddard/
  45. http://www.mtu.edu/