File:Sig06-006.jpg
原始文件 (2,400 × 2,700像素,文件大小:4.39 MB,MIME类型:image/jpeg)
说明
摘要
[编辑]Like great friends, galaxies stick together. Astronomers using NASA's Spitzer Space Telescope have spotted a handful of great galactic pals bonding back when the universe was a mere 4.6 billion years old. The universe is believed to be 13.7 billion years old.
Collectively, these great galactic buddies are called galaxy clusters. A typical galaxy cluster can contain hundreds of galaxies and trillions of stars.
In this false-color composite, some of the oldest galaxy clusters in the universe pose for Spitzer's Infrared Array Camera. The individual galaxies that make up the distant clusters are shown as red dots in all four images.
The green blobs are Milky Way stars along the line of sight, and the blue specks are faint galaxies at various distances along the line of sight. The green and blue data are from a visible-light, ground-based telescope.
The cluster at 9.1 billion light-years away (lower right panel) is currently the most distant galaxy cluster ever detected.
These images are three-color composites, in which blue represents visible light with a wavelength of 0.4 microns, and green indicates visible light of 0.8 microns. The visible data were captured by the ground-based Mosaic-1 camera at the Kitt Peak National Observatory in Tucson, Ariz. Red represents infrared light of 4.5 microns, captured by Spitzer's infrared array camera.
File info
[编辑]描述Sig06-006.jpg | Great Galactic Buddies |
日期 | January 10 - 14, 2004 |
来源 | http://gallery.spitzer.caltech.edu/Imagegallery/image.php?image_name=sig06-006 |
作者 | NASA/JPL-Caltech/S.A. Stanford (UC Davis/LLNL) |
授权 (二次使用本文件) |
http://www.spitzer.caltech.edu/Media/mediaimages/copyright.shtml |
Individual images
[编辑]see http://gallery.spitzer.caltech.edu/Imagegallery/image.php?image_name=sig06-006 High quality tif files also avaliable.
许可协议
[编辑]Public domainPublic domainfalsefalse |
本文件完全由NASA创作,在美国属于公有领域。根据NASA的版权方针,NASA的材料除非另有声明否则不受版权保护。(参见Template:PD-USGov/zh、NASA版权方针页面或JPL图片使用方针。) | ||
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日期/时间 | 缩略图 | 大小 | 用户 | 备注 | |
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当前 | 2007年7月11日 (三) 18:58 | 2,400 × 2,700(4.39 MB) | Anzibanonzi(留言 | 贡献) | ==Summary== Like great friends, galaxies stick together. Astronomers using NASA's Spitzer Space Telescope have spotted a handful of great galactic pals bonding back when the universe was a mere 4.6 billion years old. The universe is believed to be 13.7 bi |
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图像标题 | 4.44 x 4.44 arcmin, N is up |
---|---|
宽度 | 2,400 px |
高度 | 2,700 px |
压缩方案 | LZW |
像素构成 | RGB |
方向 | 正常 |
色彩组分数 | 3 |
水平分辨率 | 300 dpi |
垂直分辨率 | 300 dpi |
数据排布 | 大块格式 |
使用软件 | Adobe Photoshop CS2 Macintosh |
文件修改日期时间 | 2006年3月20日 (一) 18:43 |
色彩空间 | 未标定 |