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首页> 外文期刊>American Scientist >Transits, Travels and Tribulations, V
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Transits, Travels and Tribulations, V

机译：过境，旅行和三角帆，V

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It is time to bring to a close this story of the 18th-century transits of Venus and the often amaz-ing expeditions to the ends of the earth that they engendered. The purpose in measuring and timing the passage of Venus across the face of the sun on the very rare occasions it is seen to do this was to establish the scale of the solar system (and eventually the scale of the universe itself). Observers had to be sent to very distant parts of the earth because the longer the baseline between them, the more accurate would be the result, and in the ill-explored world of the 1760s this would cost more than one of them his life. But before we turn to the ultimate results of these undertakings we must look at one more of the expeditions, the most famous of them all, the British expedition to the South Pacific for the 1769 transit.
机译：现在该结束有关金星18世纪过境以及它们引起的对地极的惊人探险的故事了。在极少见的情况下，测量和计时金星通过太阳表面的时间的目的是确定太阳系的尺度（最终确定宇宙本身的尺度）。观察员必须被派往地球很远的地方，因为它们之间的基线时间越长，结果就越准确，而在1760年代经历了漫长探索的世界中，这将使他们的生命损失不止一个。但是，在我们谈谈这些事业的最终结果之前，我们必须先看一看其中最著名的一次探险，即英国探险队前往1769年过境的南太平洋。

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