File:Sig07-009.jpg
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原始文件 (3,180 × 2,456像素,文件大小:5.94 MB,MIME类型:image/jpeg)
摘要
This beautiful galaxy is tilted at an oblique angle on to our line of sight, giving a "birds-eye view" of the spiral structure. The galaxy is similar to our Milky Way, but our favorable view provides a better picture of the typical architecture of spiral galaxies.
M81 may be undergoing a surge of star formation along the spiral arms due to a close encounter it may have had with its nearby spiral galaxy NGC 3077 and a nearby starburst galaxy (M82) about 300 million years ago.
M81 is one of the brightest galaxies that can be seen from the Earth. It is high in the northern sky in the circumpolar constellation Ursa Major, the Great Bear. At an apparent magnitude of 6.8 it is just at the limit of naked-eye visibility. The galaxy's angular size is about the same as that of the Full Moon.
This image combines data from the Hubble Space Telescope, the Spitzer Space Telescope, and the Galaxy Evolution Explorer (GALEX) missions. The GALEX ultraviolet data were from the far-UV portion of the spectrum (135 to 175 nanometers). The Spitzer infrared data were taken with the IRAC 4 detector (8 microns). The Hubble data were taken at the blue portion of the spectrum.
File info
描述Sig07-009.jpg | Multiwavelength M81 |
日期 | |
来源 | https://www.spitzer.caltech.edu/image/sig07-009-multiwavelength-m81 |
作者 | Hubble data: NASA, ESA, and A. Zezas (Harvard-Smithsonian Center for Astrophysics); GALEX data: NASA, JPL-Caltech, GALEX Team, J. Huchra et al. (Harvard-Smithsonian Center for Astrophysics); Spitzer data: NASA/JPL/Caltech/S. Willner (Harvard-Smithsonian Center for Astrophysics |
授权 (二次使用本文件) |
https://www.spitzer.caltech.edu/page/image-use-policy |
Individual images
see https://www.spitzer.caltech.edu/image/sig07-009-multiwavelength-m81 High quality tif files also avaliable.
许可协议
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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30 5 2007
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当前 | 2007年7月11日 (三) 20:39 | 3,180 × 2,456(5.94 MB) | Anzibanonzi | ==Summary== This beautiful galaxy is tilted at an oblique angle on to our line of sight, giving a "birds-eye view" of the spiral structure. The galaxy is similar to our Milky Way, but our favorable view provides a better picture of the typical architectur |
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宽度 | 2,456 px |
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高度 | 3,180 px |
每色彩组分位数 |
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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 CS3 Macintosh |
文件修改日期时间 | 2007年5月30日 (三) 11:31 |
色彩空间 | 未标定 |
图像宽度 | 3,180 px |
图像高度 | 2,456 px |
数字化日期时间 | 2007年5月30日 (三) 04:31 |
元数据最后修改日期 | 2007年5月30日 (三) 04:31 |
IIM版本 | 2 |