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必修5《Using LanguageⅡ》PPT课件优质课下载
born: in Poland in 1473
died : May 24, 1543
He was one of the first scientists to use mathematical observations to collect information. He put forward a revolutionary theory.
What is the main idea ？
How Copernicus put forward the revolutionary theory and how he dealt with it.
Showing Copernicus’ theory
Before Copernicus’ theory
Careful reading
Read the text carefully, then answer these questions
Groupwork
Questions
Why could not he tell about his theory?
What was his theory about?
When did Copernicus complete his theory?
When did he publish his idea?
What is the problem if the earth is the center of the universe?
Why could not he tell about his theory?
Because the powerful Christian Church would have punished him if he had suggested such an idea.
(2) What was his theory about?
The earth was not the centre of the solar system. Only if you put the sun there did the movements of the other planets in the sky make sense.
(3)What is the problem if the earth is the center of the universe?
Some planets seemed to stop, move backward and then go forward in a loop. Others appeared brighter at times and less bright at others.
(4) When did Copernicus complete his theory?
Between 1510 and 1514 ，he worked on it, gradually improving his theory until he felt it was complete.
(5) When did he publish his idea?