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CopernicusBirth:February 19,1473 Death:May 24,1543 Place of Birth:Toru,Poland Career:1491-1494 Studied mathematics at Krakw Academy 1496 Went to Italy to study astronomy and law at the University of Bologna 1497 Began observations of the Sun,Moon,and planets 1514 Wrote Commentariolus,an outline of his astronomical ideas,but did not circulate it widely 1543 Published De Revolutionibus Orbium Coelestium(On the Revolutions of the Celestial)Read quickly and try to draw the two theories of the universe.Before Copernicus theoryCopernicus theoryThe Earth was the center of the solar system,and the Sun and planets moved around it.The Sun is the center of the solar system,and the Earth and the other planets go around it.1.How did the problem arise?Noticed that some,others appeared brighter at times and less bright at others.2.How did he manage to find the answer?Collected observations of,used all his mathematical knowledge3.How many findings did he have?What are they?4.What were his friends attitude toward his theory?5.Why was he so cautious that he didnt dare to publish his theory?6.How important is his theory?1.At Copernicus time,Christian Church was in charge of many western countries.2.It was Copernicus who first noticed that some planets in the sky moved strangely.3.Copernicus didnt show his new theory to his friends until he completed it.4.His friends were not interested in his ideas.5.Since he was not afraid of being attacked by the Church,Copernicus published his book as soon as he finished working on it.6.Newton,Einstein,and Hawking are all scientists who made contribution to the study of the universe.TFFFFT1.Only if you put the sun there did the movements of the other planets in the sky make sense.2.Others appeared brighter at times and less bright at others.3.So between 1510 and 1514 he worked on it,gradually improving his theory until he felt it was complete.4.The changes he made to the old theory were revolutionary.5.He did not want to be attacked by the Christian Church,so he only published it as he lay dying in 1543.6.Yet Copernicus theory is now the basis on which all our ideas of the universe are built.enthusiastic enthusiasm enthusiastically She shows boundless _ for the work.She greeted him _ with a kiss.She is very _ about Eastern music.enthusiasmenthusiasticallyenthusiastic