File:Lyman-alpha blob LAB-1.jpg
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[編輯]描述Lyman-alpha blob LAB-1.jpg |
English: This image shows one of the largest known single objects in the Universe, the Lyman-alpha blob LAB-1. This picture is a composite of two different images taken with the FORS instrument on the Very Large Telescope (VLT) — a wider image showing the surrounding galaxies and a much deeper observation of the blob itself at the centre made to detect its polarisation. The intense Lyman-alpha ultraviolet radiation from the blob appears green after it has been stretched by the expansion of the Universe during its long journey to Earth. These new observations show for the first time that the light from this object is polarised. This means that the giant "blob" must be powered by galaxies embedded within the cloud. |
日期 | |
來源 | http://www.eso.org/public/images/eso1130a/ |
作者 | ESO/M. Hayes |
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[編輯]This media was created by the European Southern Observatory (ESO).
Their website states: "Unless specifically noted, the images, videos, and music distributed on the public ESO website, along with the texts of press releases, announcements, pictures of the week, blog posts and captions, are licensed under a Creative Commons Attribution 4.0 International License, and may on a non-exclusive basis be reproduced without fee provided the credit is clear and visible." To the uploader: You must provide a link (URL) to the original file and the authorship information if available. | |
此檔案採用創用CC 姓名標示 4.0 國際授權條款。 姓名標示: ESO/M. Hayes
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目前 | 2011年8月18日 (四) 13:51 | 2,042 × 2,042(671 KB) | Jmencisom(留言 | 貢獻) |
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