File:Galaxies spiralling around Leo.jpg
原始檔案 (3,953 × 2,872 像素,檔案大小:6.86 MB,MIME 類型:image/jpeg)
摘要
描述Galaxies spiralling around Leo.jpg |
English: Shown here is a spiral galaxy known as NGC 3455, which lies some 65 million light-years away from us in the constellation of Leo (The Lion).
Galaxies are classified into different types according to their structure and appearance. This classification system is known as the Hubble Sequence, named after its creator Edwin Hubble. In this sequence, NGC 3455 is known as a type SB galaxy — a barred spiral. Barred spiral galaxies account for approximately two thirds of all spirals. Galaxies of this type appear to have a bar of stars slicing through the bulge of stars at their centre. The SB classification is further sub-divided by the appearance of a galaxy's pinwheeling spiral arms; SBa types have more tightly wound arms, whereas SBc types have looser ones. SBb types, such as NGC 3455, lie in between. NGC 3455 is part of a pair of galaxies — its partner, NGC 3454, lies out of frame. This cosmic duo belong to a group known as the NGC 3370 group, which is in turn one of the Leo II groups, a large collection of galaxies scattered some 30 million light-years to the right of the Virgo cluster. This new image is from Hubble's Advanced Camera for Surveys (ACS). A version of this image was entered into the Hubble's Hidden Treasures image processing competition by contestant Nick Rose. |
日期 |
約2014年 date QS:P,+2014-00-00T00:00:00Z/9,P1480,Q5727902 |
來源 | http://www.spacetelescope.org/images/potw1415a/ |
作者 | ESA/Hubble & NASA, Acknowledgement: Nick Rose |
授權條款
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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日期/時間 | 縮圖 | 尺寸 | 使用者 | 備註 | |
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目前 | 2014年4月16日 (三) 00:22 | 3,953 × 2,872(6.86 MB) | Jmencisom | User created page with UploadWizard |
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來源 | ESA/Hubble |
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製作/提供者 | ESA/Hubble & NASA Acknowledgement: Nick Rose |
影像標題 |
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簡稱 |
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使用條款 |
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資料產生的日期時間 | 2014年4月14日 (一) 10:00 |
使用軟體 | Adobe Photoshop CS6 (Windows) |
原始文件唯一識別碼 | xmp.did:AA63B05EC50DE3118021AFEAAB38FDC1 |
關鍵字 | NGC 3455 |
聯絡資訊 |
http://www.spacetelescope.org/ Karl-Schwarzschild-Strasse 2 Garching bei München, , D-85748 Germany |