File:A globular cluster’s striking red eye ESA17634887.tiff
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![File:A globular cluster’s striking red eye ESA17634887.tiff](https://upload.wikimedia.org/wikipedia/commons/thumb/4/42/A_globular_cluster%E2%80%99s_striking_red_eye_ESA17634887.tiff/lossy-page1-753px-A_globular_cluster%E2%80%99s_striking_red_eye_ESA17634887.tiff.jpg?20240821021645)
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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).
Summary
[edit]DescriptionA globular cluster’s striking red eye ESA17634887.tiff |
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. |
Date | 10 August 2018 (upload date) |
Source | A globular cluster’s striking red eye |
Author | European Space Agency |
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Activity InfoField | Space Science |
Mission InfoField | Hubble Space Telescope |
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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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Attribution: ESA/Hubble & NASA, CC BY 4.0
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current | 02:16, 21 August 2024 | ![]() | 3,908 × 3,110 (30.09 MB) | OptimusPrimeBot (talk | contribs) | #Spacemedia - Upload of https://www.esa.int/var/esa/storage/images/esa_multimedia/images/2018/08/a_globular_cluster_s_striking_red_eye/17634877-1-eng-GB/A_globular_cluster_s_striking_red_eye.tif via Commons:Spacemedia |
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Width | 3,908 px |
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Height | 3,110 px |
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Compression scheme | LZW |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Number of rows per strip | 22 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop CC (Windows) |
File change date and time | 10:51, 21 July 2018 |
Color space | Uncalibrated |