﻿ 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 __________________________________________________________________ [19]< | [20]Archive | [21]Submissions | [22]Index | [23]Search | [24]Calendar | [25]RSS | [26]Education | [27]About APOD | [28]Discuss | [29]> __________________________________________________________________ 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/