File:Tycho-supernova-xray.jpg
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[編輯]描述Tycho-supernova-xray.jpg | Tycho's Supernova Remnant. In 1572, the Danish astronomer Tycho Brahe observed and studied the explosion of a star that became known as Tycho's supernova. More than four centuries later, Chandra's image of the supernova remnant shows an expanding bubble of multimillion degree debris (green and red) inside a more rapidly moving shell of extremely high energy electrons (filamentary blue). As a huge ball of exploding plasma, it was Irving Langmuir who coined the name plasma because of its similarity to blood plasma, and Hannes Alfvén who noted its cellular nature. The filamentary blue outer shell of X-ray emitting high-speed electrons is also a characteristic of plasmas. This is a false-colour x-ray image in which the energy levels (in keV) of the x-rays have been assigned colours as follows: Red 0.95-1.26 keV, Green 1.63-2.26 keV, Blue 4.1-6.1 keV. All x-rays images must use processed colours since x-rays (as are radio waves, infra-red) are invisible to the human eye. But they are not invisible to suitable equipment, such as x-ray telescopes. The red and green bands highlight the expanding cloud of plasma with temperatures in the millions of degrees. |
日期 | 攝於2003年4月29日 |
來源 | http://chandra.harvard.edu/photo/2005/tycho/; see also https://www.flickr.com/photos/smithsonian/2941525398/ |
作者 | NASA/CXC/Rutgers/J.Warren & J.Hughes et al. |
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[編輯]Public domainPublic domainfalsefalse |
本作品由NASA創作,屬於公有領域。根據NASA的版權政策:“NASA的創作除非另有聲明否則不受版權保護。”(參見:Template:PD-USGov/zh,NASA版權政策或JPL圖像使用政策) | ||
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[編輯]Originally uploaded on the En-Wiki by en:User:Iantresman 12:40, 23 September 2005
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日期/時間 | 縮圖 | 尺寸 | 用戶 | 備註 | |
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目前 | 2005年12月22日 (四) 21:57 | 2,400 × 2,400(609 KB) | Solipsist~commonswiki(對話 | 貢獻) | Larger 2024x2024 jpeg based on 6.3Mb Tiff at source: http://chandra.harvard.edu/photo/2005/tycho/ | |
2005年12月22日 (四) 21:52 | 576 × 576(293 KB) | Solipsist~commonswiki(對話 | 貢獻) | == Summary == '''Tycho's Supernova Remnant'''. In 1572, the Danish astronomer Tycho Brahe observed and studied the explosion of a star that became known as Tycho's supernova. More than four centuries later, Chandra's image of the supernova remnant shows a |
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