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 4
    [2]The featured image shows a starfield with a two- colored nebula in
    the center. The nebula is colored mostly red and blue. Please see the
                 explanation for more detailed information.

                          NGC 6995: The Bat Nebula
                 Image Credit & Copyright: [3]Mike Taivalmaa

   Explanation: Can you see the bat? It haunts [4]this cosmic close-up of
   the eastern [5]Veil Nebula. The [6]Veil Nebula itself is a large
   supernova remnant, the expanding debris cloud from the [7]death
   explosion of a massive [8]star. While the Veil is roughly [9]circular
   in shape and covers nearly 3 degrees on the sky toward the
   constellation of the Swan ([10]Cygnus), NGC 6995, known informally as
   the Bat Nebula, spans only 1/2 degree, about the apparent size [11]of
   the Moon. That [12]translates to 12 light-years at the Veil's estimated
   distance, a reassuring 1,400 light-years from [13]planet Earth. In the
   composite of image data recorded through [14]narrow band filters,
   emission from [15]hydrogen atoms in the remnant is shown in red with
   strong emission from [16]oxygen atoms shown in hues of blue. Of course,
   in the western part of the Veil lies [17]another seasonal apparition:
   [18]the Witch's Broom Nebula.

       Teachers & Students: [19]Ideas for using APOD in the classroom
                     Tomorrow's picture: friendly spiral
     __________________________________________________________________

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    Authors & editors: [31]Robert Nemiroff ([32]MTU) & [33]Jerry Bonnell
                                 ([34]UMCP)
          NASA Official: Amber Straughn [35]Specific rights apply.
            [36]NASA Web Privacy, [37]Accessibility, [38]Notices;
                A service of: [39]ASD at [40]NASA / [41]GSFC,
                         [42]NASA Science Activation
                           & [43]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2409/Bat_Taivalnaa_4200.jpg
   3. https://www.facebook.com/people/Tux-Forensics/100089369981227/
   4. https://www.astrobin.com/8goim6/
   5. https://en.wikipedia.org/wiki/Veil_Nebula
   6. https://apod.nasa.gov/apod/ap191031.html
   7. https://www.youtube.com/watch?v=OyntBsxoEkA
   8. https://starchild.gsfc.nasa.gov/docs/StarChild/universe_level1/stars.html
   9. https://www.mathsisfun.com/algebra/trig-interactive-unit-circle.html
  10. https://en.wikipedia.org/wiki/Cygnus_(constellation)
  11. https://apod.nasa.gov/apod/ap130801.html
  12. https://chandra.harvard.edu/photo/scale_distance.html
  13. https://www.globe.gov/en
  14. https://apod.nasa.gov/apod/ap071102.html
  15. https://periodic.lanl.gov/1.shtml
  16. https://youtu.be/5Q3ft8OsFaM
  17. https://i.ytimg.com/vi/1Kl4rNUTWCA/hqdefault.jpg
  18. https://apod.nasa.gov/apod/ap180408.html
  19. https://apod.nasa.gov/apod/lib/apodclass.html
  20. https://apod.nasa.gov/apod/ap240903.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.com/feed.rss
  27. https://apod.nasa.gov/apod/lib/edlinks.html
  28. https://apod.nasa.gov/apod/lib/about_apod.html
  29. https://asterisk.apod.com/discuss_apod.php?date=240904
  30. https://apod.nasa.gov/apod/ap240905.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://www.nasa.gov/general/accessibility/
  38. https://www.nasa.gov/privacy/
  39. https://astrophysics.gsfc.nasa.gov/
  40. https://www.nasa.gov/
  41. https://www.nasa.gov/centers/goddard/
  42. https://science.nasa.gov/learners
  43. http://www.mtu.edu/