File:Quasar HE 0109-3518.tiff
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Original file (1,600 × 1,700 pixels, file size: 4.79 MB, MIME type: image/tiff)
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[edit]DescriptionQuasar HE 0109-3518.tiff |
English: This deep image shows the region of the sky around the quasar HE0109-3518. The quasar is near the centre of the image. The energetic radiation of the quasar makes dark galaxies glow, helping astronomers to understand the obscure early stages of galaxy formation. Dark galaxies are essentially devoid of stars, therefore they don’t emit any light that telescopes can catch. This makes them virtually impossible to observe unless they are illuminated by an external light source like a background quasar.
This image combines observations from the Very Large Telescope, tuned to detect the fluorescent emissions produced by the quasar illuminating the dark galaxies, with colour data from the Digitized Sky Survey 2. |
Date | |
Source | http://www.eso.org/public/images/eso1228a/ |
Author | ESO, Digitized Sky Survey 2 and S. Cantalupo (UCSC) |
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[edit]This file is licensed under the Creative Commons Attribution 3.0 Unported license.
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 10:32, 13 July 2012 | 1,600 × 1,700 (4.79 MB) | Jmencisom (talk | contribs) |
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Width | 1,600 px |
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Height | 1,700 px |
Bits per component |
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Compression scheme | LZW |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Number of rows per strip | 54 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop CS5 Windows |
File change date and time | 11:52, 2 July 2012 |
Color space | Uncalibrated |
warning | wrong data type 7 for "Photoshop"; tag ignored. |