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.

                               2022 February 9

         IFRAME: [2]https://www.youtube.com/embed/NS71ppsk7n0?rel=0

             Eta Car: 3D Model of the Most Dangerous Star Known
      Video Credit: [3]NASA, [4]CXC, April Hobart; Text: [5]Michael F.
                Corcoran ([6]NASA, [7]Catholic U., [8]HEAPOW)

   Explanation: What's the most [9]dangerous star near earth? Many believe
   it's [10]Eta Carinae, a binary star system about 100 times the mass of
   the Sun, just 10,000 light years from earth. [11]Eta Carinae is a
   ticking time bomb, set to explode as a [12]supernova in only a few
   million years, when it may [13]bathe the earth in dangerous gamma rays.
   The star suffered a [14]notorious outburst in the 1840s when it became
   the brightest star in the southern sky, only to [15]fade to obscurity
   within decades. The star was not destroyed, but lies hidden behind a
   thick, [16]expanding, double-lobed structure called the Homunculus
   which now surrounds the binary. [17]Studies of this ejecta provide
   forensic clues about the explosion. Using observations from NASA
   satellites we can now [18]visualize the 3D distribution of the
   shrapnel, all the way from the infrared, through optical and UV, to the
   outermost shell of million-degree material, visible only in X-rays.

                       Tomorrow's picture: open space
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    Authors & editors: [30]Robert Nemiroff ([31]MTU) & [32]Jerry Bonnell
                                 ([33]UMCP)
          NASA Official: Phillip Newman [34]Specific rights apply.
              [35]NASA Web Privacy Policy and Important Notices
                A service of: [36]ASD at [37]NASA / [38]GSFC
                           & [39]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://www.youtube.com/embed/NS71ppsk7n0?rel=0
   3. https://www.nasa.gov/
   4. https://www.nasa.gov/mission_pages/chandra/main/index.html
   5. https://science.gsfc.nasa.gov/sed/bio/michael.f.corcoran
   6. https://www.nasa.gov/
   7. https://physics.catholic.edu/
   8. https://heasarc.gsfc.nasa.gov/docs/objects/heapow/
   9. https://earthsky.org/astronomy-essentials/safe-distance-from-a-supernova-earth/
  10. https://apod.nasa.gov/apod/ap190220.html
  11. https://youtu.be/OaBxMo4b74g
  12. https://spaceplace.nasa.gov/supernova/en/
  13. https://astrobiology.nasa.gov/news/how-deadly-would-a-nearby-gamma-ray-burst-be/
  14. https://www.youtube.com/watch?v=07hqULmszC8
  15. https://heasarc.gsfc.nasa.gov/docs/objects/heapow/archive/stars/ec_lc_rxte.html
  16. https://apod.nasa.gov/apod/ap141202.html
  17. https://cutecatshq.com/wp-content/uploads/2015/04/Curious-cat.jpg
  18. https://chandra.si.edu/photo/2022/etacar/animations.html
  19. https://apod.nasa.gov/apod/ap220208.html
  20. https://apod.nasa.gov/apod/archivepix.html
  21. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  22. https://apod.nasa.gov/apod/lib/aptree.html
  23. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  24. https://apod.nasa.gov/apod/calendar/allyears.html
  25. https://apod.nasa.gov/apod.rss
  26. https://apod.nasa.gov/apod/lib/edlinks.html
  27. https://apod.nasa.gov/apod/lib/about_apod.html
  28. http://asterisk.apod.com/discuss_apod.php?date=220209
  29. https://apod.nasa.gov/apod/ap220210.html
  30. http://www.phy.mtu.edu/faculty/Nemiroff.html
  31. http://www.phy.mtu.edu/
  32. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  33. http://www.astro.umd.edu/
  34. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  35. https://www.nasa.gov/about/highlights/HP_Privacy.html
  36. https://astrophysics.gsfc.nasa.gov/
  37. https://www.nasa.gov/
  38. https://www.nasa.gov/centers/goddard/
  39. http://www.mtu.edu/