File:A spiral home to exploding stars.jpg

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描述A spiral home to exploding stars.jpg	English: In this new Hubble image, we can see an almost face-on view of the galaxy NGC 1084. At first glance, this galaxy is pretty unoriginal. Like the majority of galaxies that we observe it is a spiral galaxy, and, as with about half of all spirals, it has no bar running through its loosely wound arms. However, although it may seem unremarkable on paper, NGC 1084 is actually a near-perfect example of this type of galaxy — and Hubble has a near-perfect view of it. NGC 1084 has hosted several violent events known as supernovae — explosions that occur when massive stars, many times more massive than the Sun, approach their twilight years. As the fusion processes in their cores run out of fuel and come to an end, these stellar giants collapse, blowing off their outer layers in a violent explosion. Supernovae can often briefly outshine an entire galaxy, before then fading away over several weeks or months. Although directly observing one of these explosions is hard to do, in galaxies like NGC 1084 astronomers can find and study the remnants left behind. Astronomers have noted five supernova explosions within NGC 1084 over the past half century. These remnants are named after the year in which they took place — 1963P, 1996an, 1998dl, 2009H, and 2012ec. The most recent explosion, 2012ec, was detected at the end of NGC 1084’s top right arm in August 2012. It is not visible here as these images were taken in 2001, some eleven years before this supernova exploded. Astronomers at Queen's University Belfast have managed to use these "before" images to directly identify the star that exploded. It appears to be a red supergiant some 10 to 20 times more massive than the Sun, and quite similar to the well-known star Betelguese in Orion. A version of this image was entered into the Hubble's Hidden Treasures image processing competition by Flickr user Brian Campbell (Sinickel).
日期	2014年3月31日, 10:00:00
来源	http://www.spacetelescope.org/images/potw1413a/
作者	NASA, ESA, and S. Smartt (Queen's University Belfast) Acknowledgement: Brian Campbell

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	日期/时间	缩⁠略⁠图	大小	用户	备注
当前	2014年3月31日 (一) 23:09		2,134 × 1,953（2.29 MB）	Jmencisom	User created page with UploadWizard

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以下其他wiki使用此文件：

ar.wikipedia.org上的用途
- NGC 1084
ca.wikipedia.org上的用途
- Galàxia espiral
de.wikipedia.org上的用途
- NGC 1084
el.wikipedia.org上的用途
- NGC 1084
en.wikipedia.org上的用途
en.wikiquote.org上的用途
- Milky Way
eu.wikipedia.org上的用途
- Galaxia
fa.wikipedia.org上的用途
- ان‌جی‌سی ۱۰۸۴
fr.wikipedia.org上的用途
- NGC 1084
it.wikipedia.org上的用途
ko.wikipedia.org上的用途
- 나선은하
lb.wikipedia.org上的用途
- NGC 1084
mk.wikipedia.org上的用途
- Спирална галаксија
pl.wikipedia.org上的用途
- NGC 1084

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来源	ESA/Hubble
提供者	NASA, ESA, and S. Smartt (Queen's University Belfast)Acknowledgement: Brian Campbell
图像标题	In this new Hubble image, we can see an almost face-on view of the galaxy NGC 1084. At first glance, this galaxy is pretty unoriginal. Like the majority of galaxies that we observe it is a spiral galaxy, and, as with about half of all spirals, it has no bar running through its loosely wound arms. However, although it may seem unremarkable on paper, NGC 1084 is actually a near-perfect example of this type of galaxy— and Hubble has a near-perfect view of it. NGC 1084 has hosted several violent events known as supernovae — explosions that occur when massive stars, many times more massive than the Sun, approach their twilight years. As the fusion processes in their cores run out of fuel and come to an end, these stellar giants collapse, blowing off their outer layers in a violent explosion. Supernovae can often briefly outshine an entire galaxy, before then fading away over several weeks or months. Although directly observing one of these explosions is hard to do, in galaxies like NGC 1084 astronomerscan find and study the remnants left behind. Astronomers have noted five supernova explosions within NGC 1084 over the past half century. These remnants are named after the year in which they took place — 1963P, 1996an, 1998dl, 2009H, and 2012ec. The most recent explosion, 2012ec, was detected atthe end of NGC 1084’s top right arm in August 2012. It is not visible here as these images were taken in 2001, some eleven years before this supernova exploded. Astronomers at Queen's University Belfast have managed to use these "before" images to directly identify the star that exploded. It appears to be a red supergiant some 10 to 20 times more massive than the Sun, and quite similar to the well-known star Betelguese in Orion. A version of this image was entered into the Hubble's Hidden Treasures image processing competition by Flickr user Brian Campbell (Sinickel).
简短标题	A spiral home to exploding stars
使用条款	Creative Commons Attribution 3.0 Unported license
数据生成日期时间	2014年3月31日 (一) 10:00
使用软件	Adobe Photoshop CS6 (Windows)
原始文件唯一ID	xmp.did:86F5805E1C25E311A5A4C3FD8C3E8B93
关键词	NGC 1084
联系信息	http://www.spacetelescope.org/ Karl-Schwarzschild-Strasse 2 Garching bei M√ºnchen, , D-85748 Germany

File:A spiral home to exploding stars.jpg

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