File:W5.jpg
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English: From the source site, courtesy of NASA/JPL-Caltech: Generations of stars can be seen in this new infrared portrait from NASA's Spitzer Space Telescope. In this wispy star-forming region, called W5, the oldest stars can be seen as blue dots in the centers of the two hollow cavities (other blue dots are background and foreground stars not associated with the region). Younger stars line the rims of the cavities, and some can be seen as pink dots at the tips of the elephant-trunk-like pillars. The white knotty areas are where the youngest stars are forming. Red shows heated dust that pervades the region's cavities, while green highlights dense clouds.
W5 spans an area of sky equivalent to four full moons and is about 6,500 light-years away in the constellation Cassiopeia. The Spitzer picture was taken over a period of 24 hours. Like other massive star-forming regions, such as Orion and Carina, W5 contains large cavities that were carved out by radiation and winds from the region's most massive stars. According to the theory of triggered star-formation, the carving out of these cavities pushes gas together, causing it to ignite into successive generations of new stars. This image contains some of the best evidence yet for the triggered star-formation theory. Scientists analyzing the photo have been able to show that the ages of the stars become progressively and systematically younger with distance from the center of the cavities. This is a three-color composite showing infrared observations from two Spitzer instruments. Blue represents 3.6-micron light and green shows light of 8 microns, both captured by Spitzer's infrared array camera. Red is 24-micron light detected by Spitzer's multiband imaging photometer.Afrikaans: Generasies sterre kan in hierdie nuwe infrarooi portret gesien word, geneem deur NASA se Spitzer-ruimteteleskoop. In W5, 'n pluimagtige stervormende streek, kan die oudste sterre gesien word as blou spikkels in die middel van die twee holtes (ander blou spikkels is agter- en voorgrond sterre wat nie met die streek geassosieer word nie). Jonger ster kan aan die kante van die holtes gesien word en sommige kan as pienk spikkels gesien word aan die punte van die olifantslurp-agtige pillare. Die wit, knoperige areas is waar die jongste sterre besig is om te vorm. Rooi toon warm stof wat die area se holtes deurdring; groen wys op digte wolke.
W5 strek oor 'n area wat gelyk is aan vier volmane en is ongeveer 6500 ligjare weg, in die sterrebeeld Cassiopeia. Die Spitzer-beeld is oor 'n periode van 24 uur geneem. Net soos ander massiewe stervormende streke, soos Orion en Carina, besit W5 groot holtes wat deur die straling en winde van die streek se massiefste sterre uitgehol word. Volgens die teorie van veroorsaakde stervorming, veroorsaak hierdie uitholling dat gasse teen mekaar gestoot word, wat veroorsaak dat dit vlam vat en opeenvolgende generasies nuwe sterre skep. Hierdie beeld bevat van die beste bewyse nog vir hierdie teorie van veroorsaakde stervorming. Wetenskaplikes wat die foto geanaliseer het, het kon wys dat die ouderdom van die sterre langsamerhand en sistematies jonger word, hoe verder dit van die middel van die holtes is. Hierdie beeld is 'n drie-kleur samestelling wat die infrarooi waarnemings van twee Spitzer-instrumente toon. Blou verteenwoordig 3,6-mikron lig en groen toon lig van 8 mikrons, beide vasgevang deur die Spitzer se infrarooi kamera. Rooi is 24-mikron lig, waargeneem deur Spitzer se multiband-afbeeldingsligmeter. |
| Data | anni '20 del I sec.eptember 2006, 28 September 2006, 16 February 2007 (IRAC); 23 February 2006 (MIPS) |
| Fonte | gallery.spitzer.caltech.edu |
| Autore | NASA/JPL-Caltech |
| Licenza (Riusare questo file) |
Unless otherwise noted, images and video on Spitzer public web sites (public sites ending with a spitzer.caltech.edu address) may be used for any purpose without prior permission ([1]). |
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Questo file è nel pubblico dominio perché creato dalla NASA. La politica sul copyright della NASA afferma che «il materiale della NASA non è protetto da copyright a meno che non sia specificato altrimenti». (NASA copyright policy e JPL Image Use Policy). |  |
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| attuale | 09:07, 23 dic 2008 | | 1 590 × 2 697 (3,14 MB) | wikimediacommons>Anrie | Cropped version |
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