Unit 4 Space Exploration单元引入&课文译文（课件）-【优化探究】2022-2023学年新教材高中英语必修第三册同步导学案（人教版2019）

下页 上页 人教英语必修第三册 Edmond Halley was an English scientist who lived over 200 years ago.He studied the observations of comets (彗星) which other scientists had made.The orbit of one particular comet was a very difficult mathematical (数学) problem.He could not figure it out.Neither could other scientists who dealt with such problems. 下页 上页 人教英语必修第三册 However，Halley had a friend named Newton，who was a brilliant mathematician.Newton thought he had already worked out that problem，but he could not find the papers on which he had done it.He told Halley that the orbit of a comet had the shape of an ellipse (椭圆)． 下页 上页 人教英语必修第三册 Now Halley set to work.He figured out the orbits of some of the comets that had been observed by scientists.He made a surprising discovery.The comets that had appeared in the years 1531,1607，and 1682 all had the same orbit.Yet their appearances had been 75 to 76 years apart. 下页 上页 人教英语必修第三册 This seemed very strange to Halley.The different comets followed the same orbit.The more Halley thought about it，the more he thought that there had not been three different comets，as people thought.He decided that they had simply seen the same comet three times.The comet had gone away and had come back again. 下页 上页 人教英语必修第三册 It was an astonishing idea! Halley felt certain enough to make a prediction of what comet would happen in the future.He decided that this comet would appear in the year 1758.There were 53 years to go before Halley's prediction could be tested.In 1758 the comet appeared in the sky.Halley did not see it，for he had died some years before.Ever since then that comet has been called Halley's Comet，in his honor. 下页 上页 人教英语必修第三册 根据短文内容判断正(T)、误(F) 1．Halley made a surprising，but correct prediction in the year 1705. ( ) 2．Halley made his discovery by doing experiments.( ) T F 下页 上页 人教英语必修第三册 $附录：UNIT 4　SPACE EXPLORATION　课文译文 下页 上页 人教英语必修第三册 [教材P40] 太空：最后的边境 “我们是否孤独？地球之外有什么？”仰望星空，人们总是想要更多地了解太空，科学家们也在努力寻找答案。他们制造运载工具，把勇敢的人送入太空，探索宇宙的秘密。他们也真的希望能发现其他足够适合生命生存的