File:Sh2-308.jpg
![File:Sh2-308.jpg](http://images.weserv.nl/?url=//upload.wikimedia.org/wikipedia/commons/thumb/a/af/Sh2-308.jpg/587px-Sh2-308.jpg)
原始文件 (4,028 × 4,113像素,文件大小:6.43 MB,MIME类型:image/jpeg)
摘要
描述Sh2-308.jpg |
English: This entrancing image shows a few of the tenuous threads that comprise Sh2-308, a faint and wispy shell of gas located 5200 light-years away in the constellation of Canis Major (The Great Dog).
Sh2-308 is a large bubble-like structure wrapped around an extremely large, bright type of star known as a Wolf-Rayet Star — this particular star is called EZ Canis Majoris. These type of stars are among the brightest and most massive stars in the Universe, tens of times more massive than our own Sun, and they represent the extremes of stellar evolution. Thick winds continually poured off the progenitors of such stars, flooding their surroundings and draining the outer layers of the Wolf-Rayet stars. The fast wind of a Wolf-Rayet star therefore sweeps up the surrounding material to form bubbles of gas. EZ Canis Majoris is responsible for creating the bubble of Sh2-308 — the star threw off its outer layers to create the strands visible here. The intense and ongoing radiation from the star pushes the bubble out further and further, blowing it bigger and bigger. Currently the edges of Sh2-308 are some 60 light-years apart! Beautiful as these cosmic bubbles are, they are fleeting. The same stars that form them will also cause their death, eclipsing and subsuming them in violent supernova explosions. |
日期 | (released) |
来源 | https://www.nasa.gov/image-feature/goddard/2017/hubbles-cosmic-bubbles; see also https://www.spacetelescope.org/images/potw1716a/ |
作者 | ESA/Hubble & NASA |
许可协议
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ESA/Hubble images, videos and web texts are released by the ESA under the Creative Commons Attribution 4.0 International license and may on a non-exclusive basis be reproduced without fee provided they are clearly and visibly credited. Detailed conditions are below; see the ESA copyright statement for full information. For images created by NASA or on the hubblesite.org website, or for ESA/Hubble images on the esahubble.org site before 2009, use the {{PD-Hubble}} tag.
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说明
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描繪內容
17 4 2017
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提供者 | ESA/Hubble & NASA |
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来源 | ESA/Hubble |
简短标题 |
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图像标题 |
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使用条款 |
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数据生成日期时间 | 2017年4月17日 (一) 06:00 |
使用软件 | Adobe Photoshop CC 2015.5 (Windows) |
文件修改日期时间 | 2016年10月19日 (三) 08:46 |
数字化日期时间 | 2016年7月27日 (三) 00:04 |
元数据最后修改日期 | 2016年10月19日 (三) 10:46 |
原始文件唯一ID | xmp.did:119f7eb8-e093-7e41-b282-6343e20c87d0 |
关键词 |
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联系信息 |
-{R|http://www.spacetelescope.org}- Karl-Schwarzschild-Strasse 2 Garching bei München, , D-85748 Germany |
IIM版本 | 4 |