【万物简史】PART III CH 8爱因斯坦的宇宙（26）_英语听力练习mp3下载-科学-沪江听力酷

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【万物简史】PART III CH 8爱因斯坦的宇宙（26）

听力简介：

莱维特的天才在于，她发现，通过比较造父变星在天空中不同角度的大小，就可以计算出它们之间的相对位置。这也是第一次有人想出了一个计算浩瀚宇宙的实用方法。然而哈佛大学的天文学家威廉•H.皮克林虽拥有一流的天文望远镜里想观察，却认为月球上的黑影是由大群大群的、随着季节迁徙的昆虫形成的~~~~

❤《万物简史》推出部落节目版，戳这里订阅:http://bulo.yeshj.com/menu/6004/

文中需听写单词或词组用[-No-]表示，句子用[---No---]表示。请边听写边理解文意，这样可以提高听力准确度，并为训练听译打下基础哦~~~

Hints:
magnitude
Cepheids
Leavitt
Cannon
smudge

We now know that Cepheids throb as they do because they are elderly stars that have moved past their "[-1-]," in the parlance of astronomers, and become red giants. The chemistry of red giants is a little weighty for our purposes here (it requires an appreciation for the properties of singly ionized helium atoms, among quite a lot else), but put simply it means that they burn their remaining fuel in a way that produces a very rhythmic, very reliable brightening and dimming. [---2---] They could be used as "standard candles"—a term she [-3-] and still in universal use. [---4---]

(Just to put these insights into perspective, it is perhaps worth noting that [---5---], the Harvard astronomer William H. Pickering, who could of course [-6-] a first-class telescope as often as he wanted, was developing his seminal theory that dark [-7-] on the Moon were caused by swarms of seasonally migrating insects.)