Friday, July 12, 2013

A Beautiful End to a Star’s Life

Composite image of planetary nebula NGC 2392. Image Credit: X-ray: NASA/CXC/IAA-CSIC/N. Ruiz et al; Optical: NASA/STScI

Stars like the Sun can become remarkably photogenic at the end of their life. A good example is NGC 2392, which is located about 4,200 light years from Earth. NGC 2392, nicknamed the "Eskimo Nebula", is what astronomers call a planetary nebula. This designation, however, is deceiving because planetary nebulas actually have nothing to do with planets. The term is simply a historic relic since these objects looked like planetary disks to astronomers in earlier times looking through small optical telescopes. Instead, planetary nebulas form when a star uses up all of the hydrogen in its core -- an event our Sun will go through in about five billion years.

When this happens, the star begins to cool and expand, increasing its radius by tens to hundreds of times its original size. Eventually, the outer layers of the star are carried away by a thick 50,000 kilometer per hour wind, leaving behind a hot core. This hot core has a surface temperature of about 50,000 degrees Celsius, and is ejecting its outer layers in a much faster wind traveling six million kilometers per hour. The radiation from the hot star and the interaction of its fast wind with the slower wind creates the complex and filamentary shell of a planetary nebula. Eventually the remnant star will collapse to form a white dwarf star.

Now days, astronomers using space-based telescopes are able to observe planetary nebulas such as NGC 2392 in ways their scientific ancestors probably could never imagine. This composite image of NGC 2392 contains X-ray data from NASA's Chandra X-ray Observatory in purple showing the location of million-degree gas near the center of the planetary nebula. Data from the Hubble Space Telescope show – colored red, green, and blue – the intricate pattern of the outer layers of the star that have been ejected. The comet-shaped filaments form when the faster wind and radiation from the central star interact with cooler shells of dust and gas that were already ejected by the star.

The observations of NGC 2392 were part of a study of three planetary nebulas with hot gas in their center. The Chandra data show that NGC 2392 has unusually high levels of X-ray emission compared to the other two. This leads researchers to deduce that there is an unseen companion to the hot central star in NGC 2392. The interaction between a pair of binary stars could explain the elevated X-ray emission found there. Meanwhile, the fainter X-ray emission observed in the two other planetary nebulas in the sample – IC 418 and NGC 6826 – is likely produced by shock fronts (like sonic booms) in the wind from the central star. A composite image of NGC 6826 was included in a gallery of planetary nebulas released in 2012. [http://chandra.harvard.edu/photo/2012/pne/]

A paper describing these results is available online and was published in the April 10th, 2013 issue of The Astrophysical Journal. The first author is Nieves Ruiz of the Instituto de Astrofísica de Andalucía (IAA-CSIC) in Granada, Spain, and the other authors are You-Hua Chu, and Robert Gruendl from the University of Illinois, Urbana; Martín Guerrero from the Instituto de Astrofísica de Andalucía (IAA-CSIC) in Granada, Spain, and Ralf Jacob, Detlef Schönberner and Matthias Steffen from the Leibniz-Institut Für Astrophysik in Potsdam (AIP), Germany.

NASA's Marshall Space Flight Center in Huntsville, Ala., manages the Chandra program for NASA's Science Mission Directorate in Washington. The Smithsonian Astrophysical Observatory controls Chandra's science and flight operations from Cambridge, Mass.

Credit: NASA

63 comments:

  1. Improv activities are a amazing way to crack the ice with your new throw, to evaluation and develop abilities and to help your stars end up in the figures they are representing and the program you will work on with them. Through improvisation workouts and activities stars understand to reply easily to changes in their atmosphere and to make in when a new way of looking at or giving answers to or showing emotions about a scenario that has been similarly as automatically designed Place for a star's credit

    ReplyDelete
  2. The Federal credit adjustment program has a wide range of money related foundations partaking, and they all take after similar criteria for tolerating candidates and they all offer similar advantages. check cashing

    ReplyDelete
  3. This credit is very hard to get, not at all like individual advances online that for the most part have negligible necessities. Be that as it may, for a chapter 11 lodging credit, the borrower must take after extremely strict necessities and high loan fees and charges. Borrowers ought to expect a littler advance sum, contrasted with different sorts of advances. cash advance chicago

    ReplyDelete
  4. Hello! I just would like to give a huge thumbs up for the great info you have here on this post. I will be coming back to your blog for more soon.
    obat untuk susah kencing

    ReplyDelete
  5. with so many references my brain becomes overwhelmed, but after knowing this blog is like all so much easier, thanks. obat lambung perih

    ReplyDelete
  6. Interesting article! Thank you for sharing them! I hope you will continue to have similar posts to share with everyone!

    ReplyDelete
  7. Thank you for sharing this article with us! I believe there will be more people like me, they can find many interesting things in this article of you!
    - driving directions

    ReplyDelete
  8. thank you very useful information admin, and pardon me permission to share articles here may help :

    Produk green world
    Rahasia langsing alami dengan cepat
    Obat kanker leukimia

    ReplyDelete
  9. Commercial Interior Fit Out Bespoke Acoustic Interiors design and fit-out interiors to the highest standard. Their experience in acoustics and interior design is leveraged with every project.They understand that each client has individual requirements and requires unique solutions. They take pride in the relationships that they have built with their clients and the amazing projects that they have delivered.

    ReplyDelete
  10. thank you very useful information admin, and pardon me permission to share articles here may help :

    Obat perih ulu hati
    Cara mengatasi paru paru terendam cairan
    Cara menyembuhkan gerd

    ReplyDelete
  11. nice post friend , Thank you for sharing with us, and we sincerely hope you will continue to update or post other articles
    cara menyembuhkan perlengketan usus

    ReplyDelete
  12. amazing post friend, keep sharing with us.
    tutuapp download

    ReplyDelete
  13. https://crackedlicense.com/camtasia-studio-crack-full-serial-key/

    Camtasia Studio 9 Crack is one the best software as a recorder that record screen of your device.

    ReplyDelete
  14. Beautiful words about the history and nature of the planets enjoyed the reading..

    Farming Simulator APK

    ReplyDelete
  15. Thanks you did a great discussion on stars life history.

    Movavi Video Editor Crack

    ReplyDelete
  16. This is one more brilliant site page that has demonstrated me astonishing resources which fuses instructional activities and materials to the critical class of topic subject. So I propose you before long experience these awesome advantages for get the hang of something which is astoundingly useful for everyone out there.
    Click here for the best friv games http://www.friv5online.link/

    ReplyDelete
  17. Mirillis Action.....
    Mirillis Action 3.1.1 Crack is a program that is being use to create, convert audio, video files, images into high quality.

    Kontakt Crack New Serial Number
    This product is very essential in music production techniques and further lyrics activities. Download and convert, change music sequence, and many more changes in

    music.

    Serato DJ Activation Code
    Serato Dj 2.0.2 Pro crack is music editing, DJing demand covering and games controlling software. It is also considered music leading and unlimited song collection tool. You can activate the DJ tool easily.

    Altium Designer License Key
    The particular application used in the designing process. This tool is most effecient in electical circuit desining and making PCB in easily. Get here free activation material and use the application in free.

    Internet Download Manager 6.30 Build 8 Crack
    Internet Download Manager 6.30 crack is now a particular application to manage the downloading process. This application setup provides the crack plus serial key that
    can activate the application.

    ReplyDelete
  18. Nice blog. you have done a very good job dear keep it up.
    Hide All IP Crack

    ReplyDelete
  19. Hey, What’s up? can’t seem to get a hang on using the internet with my old age but I’m very interested in What your post actually means?..only because I agree totally with your information Your blog posts and everything is very precise. I have to come back later to read more, please keep making more posts!

    ReplyDelete
  20. Pdffactory Pro
    Amazing blog thanks admin for sharing nice article

    ReplyDelete
  21. Kaspersky Internet Security-
    When you go online shopping or banking – we protect your money & account details… when you socialize – we safeguard your identity… when you

    ReplyDelete
  22. XYplorer Crack
    XYplorer is an integrated file manager application that features a versatile preview and a highly customizable with dual panes interface. XYplorer (formerly known as TrackerV3) combines features found in Windows Explorer

    ReplyDelete
  23. NetBalancer Crack
    NetBalancer is a great tool that serves as network analyzer, network controller and network monitoring tool. By using NetBalancer, you will easily to control the use of networks such as determining the priority of an

    ReplyDelete
  24. VSDC Video Editor Crack
    Very great and more amazing article thanks for sharing

    ReplyDelete
  25. Itranslate Mac
    Very great and super article thanks for sharing

    ReplyDelete
  26. woww great actualy i read out your blog and this is fanstastic admin

    ReplyDelete
  27. I will see and refer some information in your post. thank you.

    ReplyDelete
  28. Howdy! This article couldn’t be written any better! Going through this post reminds me of my previous roommate!
    He constantly kept talking about this. I’ll send this article to him. Pretty sure he’s going to have a great read.
    fonepaw android data recovery crack

    ReplyDelete
  29. Exactly, here is the right webpage for anybody who wants to find out about this topic.
    You realize so much its almost tough to argue with you.Excellent stuff, just wonderful!
    types of paratha

    ReplyDelete
  30. IDM Crack is a device that was first present in 25-Nov-2005. Around then individuals didn't know about quick downloading gadgets or programming. It was an Internet Download Manger (IDM) that give the offices of in excess of five times quicker downloading speed. IDM quicker downloading as well as give the resume and booking highlights. Presently, its a period of immense measure of information downloading like recordings, sounds and programming applications,therefore, individuals love this instrument to introduce in their PCs. The most entrancing component of IDM is a recommendation of downloading, when we viewing a video or listening the music. This wonderful highlights pulls in additional to get this product in close to home utilize. There are million of individuals that are utilizing this apparatus particularly from USA, Canada and Europe. Here we are furnishing the IDM Crack with full fix free download. Before entire downloading, we will examine the primary highlights.
    IDM Crack
    IDM Patch
    Download IDM Crack

    ReplyDelete
  31. Since it may be inferred from its own title, iCare Data Recovery Crack is an application program that enables its clients to recover documents that they've erased or uninstalled in their equipment, as hard drives, streak drives, memory card and SD cards. There are commonly when our records saved money on a specific industry of the PC and hard plate catch defiled from infections and we as a whole think that its extreme to open or read these archives. Subsequently, iCare Date Retrieval set up on the PC, that is never again an issue in that capacity reports can promptly be recuperated with that. What's more, comparative devices is here.
    iCare Data Recovery Full Version
    iCare Data Recovery Key
    iCare Data Recovery Pro Crack
    iCare Data Recovery Pro License Key
    iCare Data Recovery Pro Patch

    ReplyDelete
  32. Thanks for sharing the info, keep up the good work going.I really enjoyed exploring your site.
    Information you share is very useful. It is closely related to my work and has helped me grow. Thank you!
    Reaper Crack

    ReplyDelete
  33. I am very lucky as I am always looking positive for such things. I am fond of reading such blogs and search of amazing thing easy to understand what you want to say in this discussion.Dissertation writing service Thanks a lot for sharing.Thank you for sharing your above info…
    Product discount master
    Discount master app

    ReplyDelete
  34. You can party like a hero with the correct look. The correct garments and embellishments can give you that hero look regardless of your identity. When you join them with the correct state of mind, you'll have heads turning at the gathering as you go into the room. I find a very good website for the scottsdale limo , If you want you can visit this site.

    ReplyDelete
  35. Thank you for sharing this article with us! I believe there will be more people like me, they can find many interesting things in this article of you!
    autoketing
    Free shipping bar
    Shopify free shipping bar app

    ReplyDelete
  36. What do I say about your posts? I love them. I read them everyday and always wait for new ones. I am very happy because I have something interesting to read. Hope you can upload more and more.
    pop on sale
    pop price guide app

    ReplyDelete
  37. The real life has changed and evolved a lot, people have also got the modern and more modern perception, let's discuss it together.
    facebook chat downloader, facebook customer service live chat, best autoketing

    ReplyDelete
  38. What do I say about your posts? I love them. I read them everyday and always wait for new ones. I am very happy because I have something interesting to read. Hope you can upload more and more.
    autoketing
    chat facebook
    live chat on facebook

    ReplyDelete
  39. I see something truly special in this post. Visit us: https://games.lol/racing/

    ReplyDelete
  40. I like to read your article because it really helps me. Thank you for sharing this post with us.
    Togel Online
    Prediksi Togel Hongkong

    ReplyDelete