File:Starburst_in_NGC_4449_(captured_by_the_Hubble_Space_Telescope).jpg
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DescriptionStarburst 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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Source | http://hubblesite.org/newscenter/archive/releases/2007/26/image/a/ (direct link) | ||||
Author | NASA, ESA, A. Aloisi (STScI/ESA), and The Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration | ||||
Permission (Reusing this file) |
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This image was selected as picture of the day on Vietnamese Wikipedia.
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November 2005
image/jpeg
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 13:45, 31 October 2009 | 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. | |
11:43, 4 July 2007 | 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 |
File usage
- Caldwell catalogue
- Herschel 400 Catalogue
- NGC 4449
- Starburst galaxy
- Talk:NGC 4449
- User:Gcosmos
- User:Kdion/be bold
- User talk:Pine/Archive 3
- User talk:Pine/Archive 5
- Wikipedia:Featured picture candidates/January-2013
- Wikipedia:Featured picture candidates/Starburst in NGC 4449
- Wikipedia:Featured pictures/Space/Looking out
- Wikipedia:Featured pictures thumbs/33
- Wikipedia:Main Page history/2014 May 27
- Wikipedia:Picture of the day/May 2014
- Template:POTD/2014-05-27
- Portal:Outer space
- Portal:Outer space/Selected picture
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- 2MASX J16430270 2040084 (مجره)
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- SDSS J091018.21+583602.3 (مجره)
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Metadata
This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
If the file has been modified from its original state, some details may not fully reflect the modified file.
Width | 8,736 px |
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Height | 5,630 px |
Bits per component |
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Compression scheme | LZW |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 13:12, 25 June 2007 |
Color space | Uncalibrated |
Image width | 8,736 px |
Image height | 5,630 px |
Date and time of digitizing | 09:12, 25 June 2007 |
Date metadata was last modified | 09:12, 25 June 2007 |
IIM version | 2 |