[文章] ［译］猎户座的星云

                               
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猎户座的星云

翻译：李颋（福建ltycho)

  资料来源：Emmanuel Mallart
  说明：在夜空中的大多数可见的星座中，漂泊在1500光年之外的灼热的猎户座大星云和马头暗星云是宇宙中的一个对比。它们都出现在这张令人陶醉的复合彩色照片中，和其他星云在一起作为巨大的猎户座分子复合云的一部分。它跨越了几百光年的范围。美丽的猎户座大星云（M42）位于图像底部。这个发射星云明亮的中心区域是用相对来说较短的30秒曝光，配用高速胶卷拍摄的。在M42上方是一群突出的蓝色反射星云和微红的发射星云，它们继续曝光到40分钟。马头星云是一个暗星云，它在图像的左上方，是一个与长长的红光有着强烈对比的V型轮廓。参宿一是猎户腰带中最东边的恒星，并且在马头星云上方是最明亮的。参宿一的左边是火焰星云，它包含着明亮的发射星云和黑暗的尘埃带。这张用望远镜拍摄的照片是2001年9月在法国南部阿尔卑斯山上海拔2800米的一个地方拍的（这样就与星星更接近了！）。

原文：
Orion Nebulosities

Explanation: Adrift 1,500 light-years away in one of the night sky's most recognizable constellations, the glowing Orion Nebula and the dark Horsehead Nebula are contrasting cosmic vistas. They both appear in this stunning composite color photograph along with other nebulosities as part of the giant Orion Molecular Cloud complex, itself hundreds of light-years across. The magnificent Orion Nebula (aka M42) lies at the bottom of the image. This emission nebula's bright central regions were captured on fast film in a relatively short 30 second exposure. Above M42 are a cluster of prominent bluish reflection nebulae and fainter reddish emission nebulae recorded in additional exposures lasting up to 40 minutes. The Horsehead appears as a dark nebula, a small silhouette notched against the long red glow at the upper left. Alnitak is the easternmost star in Orion's belt and is seen as the brightest star above the Horsehead. Immediately to Alnitak's left is the Flame Nebula, with clouds of bright emission and dramatic dark dust lanes. The telescopic exposures were made from a site in the Southern French Alps at an altitude of 2,800 meters (a little closer to the stars!) in September of 2001.

汗 ，我还在高中时候的帖子

原来福建ltycho叫李颋……