File:NGC 1222 - HST - potw1645a.tif
原始文件 (3,226 × 2,525像素,文件大小:14.66 MB,MIME类型:image/tiff)
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描述NGC 1222 - HST - potw1645a.tif |
A greedy giant NGC 1222, seen in this image taken with the Wide Field Camera 3 on board the NASA/ESA Hubble Space Telescope (HST), is a galaxy with a rather eventful story to tell. NGC 1222 has been described as a peculiar example of a type of galaxy known as a lenticular galaxy. Typically, this kind of galaxy would present a rather smooth appearance on the sky and would consist mostly of old, reddish stars. A bit dull, perhaps. But NGC 1222 is certainly not a typical member of its class — and it’s anything but dull. Observations show the characteristic features of very recent star formation on a huge scale — an event known as a starburst. The reason for all this violent activity is caused by the fact that NGC 1222 is not alone. It actually contains three compact regions, each of which appears to be the central nucleus of a galaxy. Astronomers think that NGC 1222 is in the process of swallowing up two much smaller dwarf galaxies that strayed too close to it. It is likely that the encounter was the trigger for the starburst in NGC 1222, bringing in fresh supplies of gas that are now fuelling the burst of star formation. Although its peculiarities were first seen in photographic images, these were not able to reveal the level of fine detail that can be recovered by Hubble. The image taken by Hubble allows us to see an astonishing amount of structure in this galaxy, emphasising its colourful history. Against the smooth background of old stars that was the original lenticular galaxy, we can clearly see dark filaments of dust and bright filaments of gas, both associated with the powerful star formation process. Credit: ESA/Hubble & NASA Coordinates Position (RA): 3 8 56.83 Position (Dec): -2° 57' 19.61" Field of view: 2.13 x 1.67 arcminutes Orientation: North is 51.9° left of vertical Colours & filters Band Wavelength Telescope Optical g 475 nm Hubble Space Telescope WFC3 Optical g 475 nm Hubble Space Telescope WFC3 Optical I 814 nm Hubble Space Telescope WFC3 Optical I 814 nm Hubble Space Telescope WFC3. |
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日期 | 7 November 2016, 06:00 (Release) | |||
来源 | http://spacetelescope.org/images/potw1645a/ http://spacetelescope.org/static/archives/images/original/potw1645a.tif | |||
作者 | ESA/Hubble and NASA | |||
授权 (二次使用本文件) |
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当前 | 2016年11月7日 (一) 09:18 | 3,226 × 2,525(14.66 MB) | Fabian RRRR(留言 | 贡献) | {{Information |Description=A greedy giant A greedy giant NGC 1222, seen in this image taken with the Wide Field Camera 3 on board the NASA/ESA Hubble Space Telescope (HST), is a galaxy with a rather eventful story to tell. NGC 1222 has been described... |
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宽度 | 3,226 px |
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高度 | 2,525 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 |
每带行数 | 27 |
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 CC 2015 (Windows) |
文件修改日期时间 | 2016年5月3日 (二) 16:13 |
色彩空间 | 未标定 |