File:Starburst_in_NGC_4449_(captured_by_the_Hubble_Space_Telescope).jpg
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![File:Starburst in NGC 4449 (captured by the Hubble Space Telescope).jpg](http://upload.wikimedia.org/wikipedia/commons/thumb/c/c1/Starburst_in_NGC_4449_%28captured_by_the_Hubble_Space_Telescope%29.jpg/800px-Starburst_in_NGC_4449_%28captured_by_the_Hubble_Space_Telescope%29.jpg)
原始文件 (8,736 × 5,630像素,文件大小:74.28 MB,MIME类型:image/jpeg)
描述Starburst in NGC 4449 (captured by the Hubble Space Telescope).jpg |
Hundreds of thousands of vibrant blue and red stars blaze in this image taken by NASA's Hubble Space Telescope. Hot bluish-white clusters of massive stars are scattered throughout the galaxy, interspersed with numerous dustier, reddish regions of current star formation. Massive dark clouds of gas and dust are silhouetted against the starlight. NGC 4449 has been forming stars for several billion years, but currently it is experiencing a star formation event at a much higher rate than in the past. This unusually explosive and intense star formation activity qualifies as a starburst. At the current rate, the gas supply that feeds the stellar production would only last for another billion years or so. Starbursts usually occur in the central regions of galaxies, but NGC 4449 has more widespread star formation activity, since the very youngest stars are observed both in the nucleus and in streams surrounding the galaxy. A global starburst like NGC 4449 resembles primordial star forming galaxies, which grew by merging with and accreting smaller stellar systems. Since NGC 4449 is close enough to be observed in great detail, it is the ideal laboratory for the investigation of what may have occurred during galactic formation and evolution in the early universe. It's likely that the current widespread starburst was triggered by interaction or merging with a smaller companion. NGC 4449 belongs to a group of galaxies in the constellation Canes Venatici. Astronomers think that NGC 4449's star formation has been influenced by interactions with several of its neighbors. Tiếng Việt: Hình ảnh thiên hà vô định hình NGC 4449 quan sát bởi kính viễn vọng không gian Hubble.
Ảnh: ASA, ESA, A. Aloisi (STScI/ESA) và The Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration |
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来源 | http://hubblesite.org/newscenter/archive/releases/2007/26/image/a/ (direct link) | ||||
作者 | NASA, ESA, A. Aloisi (STScI/ESA), and The Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration | ||||
授权 (二次使用本文件) |
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This image was selected as picture of the day on Vietnamese Wikipedia.
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说明
共享资源质量评价 简体中文(已转写)
维基共享资源特色图片 简体中文(已转写)
11月 2005
image/jpeg
数据大小 简体中文(已转写)
77,885,833 字节
5,630 像素
8,736 像素
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日期/时间 | 缩略图 | 大小 | 用户 | 备注 | |
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当前 | 2009年10月31日 (六) 13:45 | ![]() | 8,736 × 5,630(74.28 MB) | Tryphon | Original size, from http://imgsrc.hubblesite.org/hu/db/images/hs-2007-26-a-full_jpg.jpg. |
2007年7月4日 (三) 11:43 | ![]() | 1,280 × 825(1.47 MB) | Winiar | {{Information |Description=NGC 4449 galaxy photo taken by Hubble Space Telescope |Source=http://hubblesite.org/newscenter/archive/releases/2007/26/image/a/format/xlarge_web/ |Date=Exposure Date(s): November 2005<br>Release Date: July 3, 2007 |Author=Image |
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宽度 | 8,736 px |
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高度 | 5,630 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 | 72 dpi |
垂直分辨率 | 72 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 | 2007年6月25日 (一) 13:12 |
色彩空间 | 未标定 |
图像宽度 | 8,736 px |
图像高度 | 5,630 px |
数字化日期时间 | 2007年6月25日 (一) 09:12 |
元数据最后修改日期 | 2007年6月25日 (一) 09:12 |
IIM版本 | 2 |