File:Starburst in NGC 4449 (captured by the Hubble Space Telescope).jpg
![File:Starburst in NGC 4449 (captured by the Hubble Space Telescope).jpg](https://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?20091031134531)
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DescripciónStarburst 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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Fuente | http://hubblesite.org/newscenter/archive/releases/2007/26/image/a/ (direct link) | ||||
Autor | NASA, ESA, A. Aloisi (STScI/ESA), and The Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration | ||||
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Fecha y hora | Miniatura | Dimensiones | Usuario | Comentario | |
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actual | 13:45 31 oct 2009 | ![]() | 8736 × 5630 (74,28 MB) | Tryphon (discusión | contribs.) | Original size, from http://imgsrc.hubblesite.org/hu/db/images/hs-2007-26-a-full_jpg.jpg. |
11:43 4 jul 2007 | ![]() | 1280 × 825 (1,47 MB) | Winiar (discusión | contribs.) | {{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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Anchura | 8736 px |
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Altura | 5630 px |
Bits por componente |
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Esquema de compresión | LZW |
Composición de pixel | RGB |
Orientación | Normal |
Número de componentes | 3 |
Resolución horizontal | 72 ppp |
Resolución vertical | 72 ppp |
Distribución de datos | formato panorámico |
Software usado | Adobe Photoshop CS2 Macintosh |
Fecha y hora de modificación del archivo | 13:12 25 jun 2007 |
Espacio de color | Sin calibrar |
Anchura de la imagen | 8736 px |
Altura de la imagen | 5630 px |
Fecha y hora de la digitalización | 09:12 25 jun 2007 |
Fecha en la cual fueron modificados por última vez los metadatos | 09:12 25 jun 2007 |
Versión IIM | 2 |