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.

                              2019 November 21
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                        Simeis 147: Supernova Remnant
               Image Credit & [3]Copyright: [4]David Lindemann

   Explanation: It's easy to get lost following the intricate looping
   filaments in [5]this detailed image of [6]supernova remnant Simeis 147.
   Also cataloged as Sharpless 2-240 it goes by the popular nickname, the
   Spaghetti Nebula. [7]Seen toward the boundary of the constellations
   Taurus and Auriga, it covers nearly 3 degrees or 6 full moons on the
   sky. That's about 150 light-years at the stellar debris cloud's
   estimated distance of 3,000 light-years. This composite includes image
   data taken through narrow-band filters where reddish emission from
   ionized hydrogen atoms and doubly ionized oxygen atoms in faint
   blue-green hues trace the [8]shocked, glowing gas. The supernova
   remnant has an estimated age of about 40,000 years, meaning light from
   the massive stellar explosion first reached Earth 40,000 years ago. But
   the expanding remnant is not the only aftermath. The cosmic catastrophe
   [9]also left behind a spinning neutron star or pulsar, all that remains
   of the original star's core.

                     Tomorrow's picture: pixels in space
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    Authors & editors: [21]Robert Nemiroff ([22]MTU) & [23]Jerry Bonnell
                                 ([24]UMCP)
          NASA Official: Phillip Newman [25]Specific rights apply.
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                A service of: [27]ASD at [28]NASA / [29]GSFC
                           & [30]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/1911/Simeis147_HaOIIIRGB_1280x1243_Lindemann.jpg
   3. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
   4. https://www.astrobin.com/users/dlindemann/
   5. https://www.astrobin.com/388143/C/
   6. http://chandra.harvard.edu/xray_sources/supernovas.html
   7. https://apod.nasa.gov/apod/ap101220.html
   8. https://apod.nasa.gov/apod/ap160715.html
   9. http://arxiv.org/abs/astro-ph/0611068
  10. https://apod.nasa.gov/apod/ap191120.html
  11. https://apod.nasa.gov/apod/archivepix.html
  12. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  13. https://apod.nasa.gov/apod/lib/aptree.html
  14. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  15. https://apod.nasa.gov/apod/calendar/allyears.html
  16. https://apod.nasa.gov/apod.rss
  17. https://apod.nasa.gov/apod/lib/edlinks.html
  18. https://apod.nasa.gov/apod/lib/about_apod.html
  19. http://asterisk.apod.com/discuss_apod.php?date=191121
  20. https://apod.nasa.gov/apod/ap191122.html
  21. http://www.phy.mtu.edu/faculty/Nemiroff.html
  22. http://www.phy.mtu.edu/
  23. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  24. http://www.astro.umd.edu/
  25. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  26. https://www.nasa.gov/about/highlights/HP_Privacy.html
  27. https://astrophysics.gsfc.nasa.gov/
  28. https://www.nasa.gov/
  29. https://www.nasa.gov/centers/goddard/
  30. http://www.mtu.edu/