本帖最后由 林夏 于 2009-11-1 15:17 编辑
今天APOD自动更新桌面后,我以为我的电脑坏了,一片惨白,点开说明才发现,一切是都宇宙的颜色搞的鬼。
原文网站:http://antwrp.gsfc.nasa.gov/apod/
The Average Color of the Universe
2009 November 1
Credit: Karl Glazebrook & Ivan Baldry (JHU)
Explanation: What color is the universe? More precisely, if the entire sky was smeared out, what color would the final mix be? This whimsical question came up when trying to determine what stars are commonplace in nearby galaxies. The answer, depicted above, is a conditionally perceived shade of beige. To determine this, astronomers computationally averaged the light emitted by one of the largest sample of galaxies yet analyzed: the 200,000 galaxies of the 2dF survey. The resulting cosmic spectrum has some emission in all parts of the electromagnetic spectrum, but a single perceived composite color. This color has become much less blue over the past 10 billion years, indicating that redder stars are becoming more prevalent. In a contest to better name the color, notable entries included skyvory, univeige, and the winner: cosmic latte.
翻译:
宇宙的平均颜色
说明:宇宙是什么颜色?更严格地讲,如果整个天空被颜色涂抹,那么最终会混合得到什么颜色?当天文学家试着测定临近的星系里何种星星是最常见的时候,这个离奇古怪的问题便被提了出来。正如上图所展示的,答案是某种条件下感知到的米白色。为了测定颜色,天文学家们通过计算机算出平均发散的光线,而使用的样本是:到目前为止所分析的2度视场星系红移巡天[注]中的200,000星系中最大星系的其中一个。结果是宇宙光谱在所有电磁波谱里有些发散,但却只能对这个复合颜色进行单一的感知。这个颜色在经过的100亿年后变得比蓝色要浅得多,意味着红色的星星正变得越来越普遍。在给宇宙颜色取个恰当名称的比赛中,值得注意的入围名称包括:天空象牙白,univeige,以及优胜者:宇宙拿铁。
[注] 2dF survey :2度视场星系红移巡天 (two-degree-field galaxy redshift survey),或2dF、2dFGRS是天文学在1997年至2002年4月11日之间使用的3.9公尺进行的红移巡天观测。
P.S.
我在查找skyvory的意思的时候,发现成大的翻译已经出来了,所以借鉴了些词语的翻译(例如skyvory),并与此翻译校对了下,但并不太满意那边的翻译,univeige我不知道该如何翻译,因为国外的文化懂的较少。 |
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