What is the purpose of the lecture? A. To explain how the heliocentric theory of the universe developed.B. To give an example of the persistence of traditional theories.C. To show that scientific knowledge is rarely influenced by philosophy.D. To compare methods in observational and theoretical astronomy.
Professor: Ok, we have been talking about how throughout history, it was often difficult for people to give up ideas which have long been taken for granted as scientific truth, even if those ideas were false. In Astronomy, for example, the distinction between the solar system and the universe wasn’t clear until modern times. 教授开篇就说人们很难放弃一些长久以来被视为科学真理的观点，即使这些观点是错误的，接着举出天文学的例子说明这一现象，所以 B 选项正确：举一个人们坚持传统观点的例子。
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