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2015-2016学年高中英语 unit4 Astronomy:the science of the stars课件 新人教版必修3


成才之路 ·英语 人教版 ·必修3 路漫漫其修远兮 吾将上下而求索 Unit 4 Astronomy:the science of the stars 话题导入 Astronomy is the oldest the science known to man. Thousands of years ago man looked at stars and wondered about the heavens. But man was limited by what he could see with his eyes alone. The Greeks studied astronomy over 2,000 years ago. They could see the size, color, and brightness of stars. They could see their places in the sky. They watched the stars move as the seasons changed. But the Greeks had no tools to help them study the starry heavens. Each new tool added to the files of astronomy; it helped man reach out into space. Until there were telescopes(望远镜), man knew little about the moon. They did not know that the planet called Saturn(土星)has rings around it. Their sight was so limited that they could not see all the planets. In the early 1700s, people thought there were only six planets. Before the spectroscope(分光镜), man did not know what kind of gases are in the sun or other stars. Without the radio telescope(电 波望远镜) we did not know that radio noises come from far out in space. Today, astronomy is a growing science. We have learned more in the last fifty years than in the whole history of astronomy. 1.The passage mainly tells us ________. A.the spectroscope helps man know what kind of gases are in the sun and other stars B.there are eight planets in space C.there was much noise in space D.science can't grow fast without modern technology 2.Thousands of years ago,_

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