Messier 101星系的紫外线图像（0009）

An Ultraviolet Image of Messier 101

Messier 101星系的紫外线图像

         This giant spiral galaxy, Messier 101 (M101), was photographed by the Ultraviolet Imaging Telescope onboard the Space Shuttle Endeavour during the Astro-2 mission (March 2 - 18, 1995). The image has been computer processed so that the colors represent the intensity of ultraviolet light. Pictures of galaxies like this one show mainly clouds of gas containing newly formed stars many times more massive than the sun, which glow strongly in ultraviolet light. In contrast, visible light pictures of galaxies tend to be dominated by the yellow and red light of older stars. Ultraviolet light, invisible to the human eye, is blocked by ozone in the atmosphere so ultraviolet pictures of celestial objects must be taken from space.

    在执行太空Astro-2实验（1995年3月2日至18日）中，奋进号航天飞机上的紫外线成像望远镜拍下了Messier 101旋涡状巨大星系的照片。照片经过电脑处理，颜色代表紫外线的强度。从这样的星系图片中，主要可以看到气体云团里许多新形成的恒星，体积比数倍的太阳还大，并在紫外线中不断膨胀。相反，星系可见光的图像更多地取决于老恒星的黄色光和红色光。因为大气层会阻隔人类肉眼不可见的紫外线，必须从太空中才能拍到天体的紫外线图像。

is blocked by ozone in the atmosphere
大气层中的臭氧会阻隔……
.....during the Astro-2 mission (March 2 - 18, 1995)
执行Astro-2任务……

is blocked by ozone in the atmosphere
大气层中的臭氧会阻隔……
.....during the Astro-2 mission (Mar ...
森林里 发表于 2011-5-31 09:47

                               
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谢谢！mission是任务的意思，ozone也漏掉了！