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 October 30
   [2]A starfield is shown with a big light bubble in the center. A bright
   star is toward the upper right in the translucent bubble. To some, the
      bubble may resemble a skull. Please see the explanation for more
                            detailed information.

                         NGC 7635: The Bubble Nebula
                     Credit & Copyright: [3]Chad Leader

   Explanation: What created this huge space bubble? Blown by the wind
   from a star, this [4]tantalizing, head-like apparition is cataloged as
   NGC 7635, but known simply as the [5]Bubble Nebula. The featured
   striking view utilizes a long exposure to reveal the intricate details
   of [6]this cosmic bubble and its environment. Although it looks
   delicate, the 10 [7]light-year diameter bubble offers evidence of
   [8]violent processes at work. Seen here above and right of [9]the
   Bubble's center, a bright hot star is embedded in the nebula's
   [10]reflecting dust. A fierce [11]stellar wind and intense radiation
   from the [12]star, which likely has a mass 10 to 20 times that of the
   [13]Sun, has blasted out the [14]structure of glowing gas against
   denser material in a surrounding [15]molecular cloud. The intriguing
   [16]Bubble Nebula lies a mere 11,000 [17]light-years away toward the
   [18]boastful constellation [19]Cassiopeia.

   Your Sky Surprise: [20]What picture did APOD feature on your birthday?
                                 (post 1995)
                    Tomorrow's picture: All Hallow's Eve
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    Authors & editors: [32]Robert Nemiroff ([33]MTU) & [34]Jerry Bonnell
                                 ([35]UMCP)
          NASA Official: Amber Straughn [36]Specific rights apply.
            [37]NASA Web Privacy, [38]Accessibility, [39]Notices;
                A service of: [40]ASD at [41]NASA / [42]GSFC,
                         [43]NASA Science Activation
                           & [44]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2410/BubbleRed_Leader_960.jpg
   3. https://www.instagram.com/ancient.photons/
   4. http://www.exploratorium.edu/ronh/bubbles/bubbles.html
   5. https://en.wikipedia.org/wiki/Bubble_Nebula
   6. https://apod.nasa.gov/apod/ap030617.html
   7. http://chandra.harvard.edu/photo/cosmic_distance.html
   8. https://apod.nasa.gov/apod/ap240109.html
   9. https://apod.nasa.gov/apod/ap170531.html
  10. https://en.wikipedia.org/wiki/Reflection_nebula
  11. http://en.wikipedia.org/wiki/Stellar_wind
  12. https://science.nasa.gov/universe/stars/
  13. https://science.nasa.gov/sun/
  14. https://ui.adsabs.harvard.edu/abs/1995A&A...295..509C/abstract
  15. https://apod.nasa.gov/apod/ap230129.html
  16. https://science.nasa.gov/image-detail/37893980612-307324af83-o/
  17. https://spaceplace.nasa.gov/light-year/
  18. https://media.istockphoto.com/id/159176199/photo/cat.jpg?s=612x612&w=0&k=20&c=U34AGa5EN0xuBbrzpSygVHcR7RHuwWAivyH7hpHw_m0=
  19. http://en.wikipedia.org/wiki/Cassiopeia_(constellation)
  20. https://apod.nasa.gov/apod/calendar/allyears.html
  21. https://apod.nasa.gov/apod/ap241029.html
  22. https://apod.nasa.gov/apod/archivepix.html
  23. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  24. https://apod.nasa.gov/apod/lib/aptree.html
  25. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  26. https://apod.nasa.gov/apod/calendar/allyears.html
  27. https://apod.com/feed.rss
  28. https://apod.nasa.gov/apod/lib/edlinks.html
  29. https://apod.nasa.gov/apod/lib/about_apod.html
  30. https://asterisk.apod.com/discuss_apod.php?date=241030
  31. https://apod.nasa.gov/apod/ap241031.html
  32. http://www.phy.mtu.edu/faculty/Nemiroff.html
  33. http://www.phy.mtu.edu/
  34. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  35. http://www.astro.umd.edu/
  36. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  37. https://www.nasa.gov/about/highlights/HP_Privacy.html
  38. https://www.nasa.gov/general/accessibility/
  39. https://www.nasa.gov/privacy/
  40. https://astrophysics.gsfc.nasa.gov/
  41. https://www.nasa.gov/
  42. https://www.nasa.gov/centers/goddard/
  43. https://science.nasa.gov/learners
  44. http://www.mtu.edu/