在托福听力考试中，我们会遇到话题，这就需要我们平时多积累。这些话题中有关天文学的话题。不知道大家对此是否了解。北京新航道为大家提供托福培训的各种素材。下面是为大家整理的“天文学”方面的托福听力话题段子，希望对大家有所帮助。

　　托福听力理科段子：天文学

　　In ancient times, many people believed the earth was a flat disc. Well over 2,000 years ago; the ancient Greek philosophers were able to put forward two good arguments proving that it was not. Direct observations of heavenly bodies were the basis of both these arguments. First, the Greeks knew that during eclipses of the moon the earth was between the sun and the moon, and they saw that during these eclipses, the earth’s shadow on the moon was always round, they realized that this could be true only if the earth was spherical, It the earth was a flat disc, then its shadow during eclipses would not be a prefect circle; it would be stretched out into a long ellipse. The second argument was based on what the Greeks saw during their travels. They noticed that the North Star, or Polaris, appeared lower in the sky when they traveled south, in the more northerly regions, the North Star appeared to them to be much higher in the sky. 来源：北京新航道托福培训By the way, it was also from this difference in the apparent position of the North Star that the Greeks first calculated the approximate distance around the circumference of the earth, a figure recorded in ancient documents says 400.000 stadium, that’s the plural of the world stadium. Today, it’s not known exactly what length one stadium represents, but let’s say it was about 200 meters, the length of many athletic stadiums. This would make the Greek’s estimate about twice the figure accepted today, a very good estimate for those writing so long before even the first telescope was invented.

　　上面是“天文学”的托福听力话题段子。这个段子有可能会在以后的考试中遇到，希望大家能够认真对待。多积累多记忆才能自己的听力水平。

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