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当前位置:首页 -> 9级英语阅读 - > 万物简史 第44期:埃文斯牧师的宇宙(8)
万物简史 第44期:埃文斯牧师的宇宙(8)
添加时间:2018-05-28 20:44:27 浏览次数: 作者:未知
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  • Surprisingly little of the universe is visible to us when we incline our heads to the sky. 令人吃惊的是,当我们把脑袋探向天空的时候,我们只能看见宇宙的极小部分。

    Only about 6,000 stars are visible to the naked eye from Earth, 从地球上,肉眼只能见到大约6000颗恒星,

    and only about 2,000 can be seen from any one spot. 从一个角度只能见到大约2000颗。

    With binoculars1 the number of stars you can see from a single location rises to about 50,000, 如果用了望远镜,我们从一处看见的星星就可以增加到大约5000颗;

    and with a small two-inch telescope it leaps to 300,000. 要是用一台5厘米的小型天文望远镜,这个数字便猛增到30万颗。

    With a sixteen-inch telescope, such as Evans uses, you begin to count not in stars but in galaxies2. 假如使用像埃文斯使用的那种40厘米天文望远镜,我们就不仅可以数恒星,而且可以数星系。

    From his deck, Evans supposes he can see between 50,000 and 100,000 galaxies, 埃文斯估计,他从阳台上可以看到的星系可达5万-10万个,

    each containing tens of billions of stars. 每个星系都由几百亿颗恒星组成。

    These are of course respectable numbers, but even with so much to take in, 这当然是个可观的数字,但即使能看到这么多,

    supernovae are extremely rare. 超新星也是极其少见的。

    A star can burn for billions of years, but it dies just once and quickly, 一颗恒星可以燃烧几十亿年,而死亡却是一下子的事儿。

    and only a few dying stars explode. Most expire quietly, like a campfire at dawn. 只有少量的临终恒星发生爆炸,大多数默默地熄灭,就像黎明时的篝火那样。

    In a typical galaxy3, consisting of a hundred billion stars, a supernova will occur on average once every two or three hundred years. 在一个由几千亿颗恒星组成的典型星系里,平均每二三百年会出现一颗超新星。

    Finding a supernova therefore was a little bit like standing4 on the observation platform of the Empire State Building with a telescope 因此,寻找一颗超新星,有点像立在纽约帝国大厦的观景台上,用望远镜

    and searching windows around Manhattan in the hope of finding, let us say, 搜索窗户外的曼哈顿四周,希望发现--比如说

    someone lighting5 a twenty-first-birthday cake. 有人在点着21岁生日蛋糕上的蜡烛。

     9级    万物简史 
     单词标签: binoculars  galaxies  galaxy  standing  lighting 


    点击收听单词发音收听单词发音  

    1 binoculars [bɪˈnɒkjələz] IybzWh   第8级
    n.双筒望远镜
    参考例句:
    • He watched the play through his binoculars. 他用双筒望远镜看戏。
    • If I had binoculars, I could see that comet clearly. 如果我有望远镜,我就可以清楚地看见那颗彗星。
    2 galaxies [ˈɡæləksiz] fa8833b92b82bcb88ee3b3d7644caf77   第7级
    星系( galaxy的名词复数 ); 银河系; 一群(杰出或著名的人物)
    参考例句:
    • Quasars are the highly energetic cores of distant galaxies. 类星体是遥远星系的极为活跃的核心体。
    • We still don't know how many galaxies there are in the universe. 我们还不知道宇宙中有多少个星系。
    3 galaxy [ˈgæləksi] OhoxB   第7级
    n.星系;银河系;一群(杰出或著名的人物)
    参考例句:
    • The earth is one of the planets in the Galaxy. 地球是银河系中的星球之一。
    • The company has a galaxy of talent. 该公司拥有一批优秀的人才。
    4 standing [ˈstændɪŋ] 2hCzgo   第8级
    n.持续,地位;adj.永久的,不动的,直立的,不流动的
    参考例句:
    • After the earthquake only a few houses were left standing. 地震过后只有几幢房屋还立着。
    • They're standing out against any change in the law. 他们坚决反对对法律做任何修改。
    5 lighting [ˈlaɪtɪŋ] CpszPL   第7级
    n.照明,光线的明暗,舞台灯光
    参考例句:
    • The gas lamp gradually lost ground to electric lighting. 煤气灯逐渐为电灯所代替。
    • The lighting in that restaurant is soft and romantic. 那个餐馆照明柔和而且浪漫。

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