File:Caldwell 53 (50291843072).jpg
原始文件 (13,488 × 8,163像素,文件大小:19.78 MB,MIME类型:image/jpeg)
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描述Caldwell 53 (50291843072).jpg |
Lacking spiral arms but boasting a galactic bulge and prominent disk, lenticular galaxies like Caldwell 53 (NGC 3115) are intermediates between the more familiar spiral and elliptical galaxies. This galaxy, like most of its kind, hosts an elderly stellar population and has used up nearly all of its star-forming material. Appearing edge-on to us, the galaxy is located 32 million light-years from Earth in the constellation Sextans and has an apparent magnitude of 9.9. Discovered by William Herschel in 1787, it is most easily observed during early spring in the Northern Hemisphere and autumn in the Southern Hemisphere. As one of the brighter galaxies, Caldwell 53 can be easily seen in a small telescope, which will display the galaxy’s spindle-like form and bright central region. Caldwell 53 is perhaps most notable for the supermassive black hole that lurks at its center. One of the ways astronomers are able to estimate the mass of a black hole is by observing the temperature of the hot gas being dragged toward it. Using this method, astronomers estimate that the black hole within Caldwell 53 has a mass roughly one billion times the mass of our Sun. This estimation means that Caldwell 53 hosts the closest billion-solar-mass black hole to Earth. This image of Caldwell 53 is a composite of observations taken by Hubble’s Advanced Camera for Surveys at infrared and visible wavelengths. Scientists used information gathered from these observations to constrain the temperature and density of the gas that surrounds the supermassive black hole at the center of the galaxy. Credit: NASA, ESA, and J. Erwin (University of Alabama); Processing: Gladys Kober (NASA/Catholic University of America) For Hubble's Caldwell catalog website and information on how to find these objects in the night sky, visit: <a href="https://www.nasa.gov/content/goddard/hubble-s-caldwell-catalog" rel="noreferrer nofollow">www.nasa.gov/content/goddard/hubble-s-caldwell-catalog</a> |
日期 | |
来源 | Caldwell 53 |
作者 | NASA Hubble Space Telescope |
许可协议
[编辑]这幅图片原始出处为Flickr的https://flickr.com/photos/144614754@N02/50291843072 ,作者为NASA Hubble 。经机器人FlickreviewR 2在2020年12月16日审查后确定为采用cc-by-2.0的协议授权使用。 |
2020年12月16日
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当前 | 2020年12月16日 (三) 17:43 | 13,488 × 8,163(19.78 MB) | Szczureq(留言 | 贡献) | Transferred from Flickr via #flickr2commons |
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- NGC 1531
- NGC 7752 and NGC 7753
- NGC 2859
- NGC 2812
- NGC 6027
- NGC 4650A
- NGC 4984
- NGC 5010
- NGC 5101
- NGC 5838
- NGC 6027b
- NGC 1260
- NGC 7315
- NGC 3632
- NGC 5820
- NGC 5613
- NGC 16
- NGC 25
- NGC 5890
- NGC 3561
- NGC 3550
- NGC 3552
- NGC 3553
- NGC 3539
- NGC 1023
- NGC 37
- NGC 7049
- NGC 2291
- NGC 7499
- NGC 5177
- NGC 7777
- NGC 4452
- NGC 474
- NGC 3271
- NGC 3267
- NGC 3269
- NGC 7600
- NGC 49
- NGC 1721
- NGC 1725
- NGC 467
- NGC 6850
- NGC 51
- NGC 262
- PGC 10922
- NGC 4866
- NGC 61
- NGC 65
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宽度 | 16,500 px |
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高度 | 18,000 px |
每色彩组分位数 | 16 |
压缩方案 | 未压缩 |
像素构成 | 黑白(黑为0) |
方向 | 正常 |
色彩组分数 | 1 |
水平分辨率 | 72 dpi |
垂直分辨率 | 72 dpi |
数据排布 | 大块格式 |
使用软件 | Adobe Photoshop 21.2 (Macintosh) |
文件修改日期时间 | 2020年8月14日 (五) 10:44 |
色彩空间 | sRGB |
数字化日期时间 | 2018年10月30日 (二) 13:58 |
元数据最后修改日期 | 2020年8月14日 (五) 06:44 |
原始文件唯一ID | xmp.did:dd5e9f51-da7c-4505-8396-54ae15e6b69f |