File:A globular cluster’s striking red eye NGC 2108.jpg

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描述	English: This Picture of the Week shows the colourful globular cluster NGC 2108. The cluster is nestled within the Large Magellanic Cloud, in the constellation of the Swordfish (Dorado). It was discovered in 1835 by the astronomer, mathematician, chemist and inventor John Herschel, son of the famous William Herschel. The most striking feature of this globular cluster is the gleaming ruby-red spot at the centre left of the image. What looks like the cluster’s watchful eye is actually a carbon star. Carbon stars are almost always cool red giants, with atmospheres containing more carbon than oxygen — the opposite to our Sun. Carbon monoxide forms in the outer layer of the star through a combination of these elements, until there is no more oxygen available. Carbon atoms are then free to form a variety of other carbon compounds, such as C2, CH, CN, C3 and SiC2, which scatter blue light within the star, allowing red light to pass through undisturbed. This image was captured by the NASA/ESA Hubble Space Telescope’s Advanced Camera for Surveys (ACS), using three different filters.
日期	2018年8月6日, 06:00:00
来源	https://www.spacetelescope.org/images/potw1832a/
作者	ESA/Hubble & NASA

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提供者	ESA/Hubble & NASA
来源	ESA/Hubble
简短标题	A globular cluster’s striking red eye
图像标题	This Picture of the Week shows the colourful globular cluster NGC 2108. The cluster is nestled within the Large Magellanic Cloud, in the constellation of the Swordfish (Dorado). It was discovered in 1835 by the astronomer, mathematician, chemist and inventor John Herschel, son of the famous William Herschel. The most striking feature of this globular cluster is the gleaming ruby-red spot at the centre left of the image. What looks like the cluster’s watchful eye is actually a carbon star. Carbon stars are almost always cool red giants, with atmospheres containing more carbon than oxygen — the opposite to our Sun. Carbon monoxide forms in the outer layer of the star through a combination of these elements, until there is no more oxygen available. Carbon atoms are then free to form a variety of other carbon compounds, such as C2, CH, CN, C3 and SiC2, which scatter blue light within the star, allowing red light to pass through undisturbed. This image was captured by the NASA/ESA Hubble Space Telescope’s Advanced Camera for Surveys (ACS), using three different filters.
使用条款	Creative Commons Attribution 4.0 International License
数据生成日期时间	2018年8月6日 (一) 06:00
JPEG文件备注	This Picture of the Week shows the colourful globular cluster, NGC 2108. The cluster is nestled within the Large Magellanic Cloud, in the constellation of the Swordfish (Dorado). It was discovered in 1835 by the astronomer, mathematician, chemist and inventor John Herschel, son of the famous William Herschel. The most striking feature of this globular cluster is the gleaming ruby-red spot at the centre left of the image. What looks like the cluster’s watchful eye is actually a carbon star. Carbon stars are almost always cool red giants, with atmospheres containing more carbon than oxygen — the opposite to our Sun. Carbon monoxide forms in the outer layer of the star through a combination of these elements, until there is no more oxygen available. Carbon atoms are then free to form a variety of other carbon compounds, such as C2, CH, CN, C3 and SiC2, which scatter blue light within the star, allowing red light to pass through undisturbed. This image was captured by the NASA/ESA Hubble Space Telescope’s Advanced Camera for Surveys (ACS) in 2016, using three different filters.
关键词	NGC 2108
联系信息	-{R\|http://www.spacetelescope.org}- Karl-Schwarzschild-Strasse 2 Garching bei München, , D-85748 Germany
IIM版本	4

File:A globular cluster’s striking red eye NGC 2108.jpg

摘要

许可协议

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此文件中描述的项目

描繪內容

NGC 2108

著作權狀態

版权所有

许可协议

知识共享署名4.0国际

成立或建立時間

6 8 2018

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image/jpeg

核對和

c5c178e40b2a4ad63b25b9181172943b0a47dcc5

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5,799,318 字节

高度

3,110 像素

寬度

3,908 像素

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