礁湖星云的气体与尘埃

译文转自:每日一天文图(台湾成大镜像)   
http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/apod.html





图片来源:每日天文一图(NASA主站)      http://antwrp.gsfc.nasa.gov/apod/

                               
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礁湖星云的气体与尘埃



影像提供与版权: Fred Vanderhaven


             说明:这张照片上的星云，是当我们以望远镜进行巡礼，到达人马座(Sagittarius)时会停下来欣赏的景点。十八世纪的天文学家梅西耶(Charles Messier)将这个星云编号为M8，而现代天文学家认为这个礁湖星云是恒星形成的区域，它位于银河中心的方向上，距离约5000光年。从这张照片可以看出很多细节，在经过移除星点的处理之后，可以很明显地看到礁湖星云中有许多细丝般发亮的氢气，黝黑的尘埃云，以及位于影像中心的紊流及沙漏状区域。这张彩色合成影像是在澳洲的雪梨附近所拍摄。以礁湖星云的距离来估计，这张照片的区域大约是30光年宽。




Gas and Dust of the Lagoon Nebula
Credit & Copyright: [email= fredems at ozemail dot com dot au]Fred Vanderhaven[/email]  

Explanation:
This beautiful cosmic cloud is a popular stop on telescopic tours of the constellation Sagittarius. Eighteenth century cosmic tourist Charles Messier cataloged the bright nebula as M8, while modern day astronomers recognize the Lagoon Nebula as an active stellar nursery about 5,000 light-years distant, in the direction of the center of our Milky Way Galaxy. Striking details can be traced through this remarkable picture, processed to remove stars and hence better reveal the Lagoon's range of filaments of glowing hydrogen gas, dark dust clouds, and the bright, turbulent hourglass region near the image center. This color composite view was recorded under dark skies near Sydney, Australia. At the Lagoon's estimated distance, the picture spans about 50 light-years.





[ 本帖最后由 Eldghost 于 2008-7-18 10:05 编辑 ]

他们是怎么移出星点的？

很绚丽的红色!!!