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
來源	https://www.spacetelescope.org/images/potw1832a/
作者	ESA/Hubble & NASA

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目前	2018年8月6日 (一) 14:28		3,908 × 3,110（5.53 MB）	Jmencisom	User created page with UploadWizard

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NGC 2108

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製作/提供者	ESA/Hubble & NASA
來源	ESA/Hubble
簡稱	A globular cluster’s striking red eye
影像標題	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.
使用條款	Creative Commons Attribution 4.0 International License
資料產生的日期時間	2018年8月6日 (一) 06:00
JPEG 檔案備註	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.
關鍵字	NGC 2108
聯絡資訊	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

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