Now it's time to read the text COPERNICUS' REVOLUTIONARY THEORY and underline all the expressions useful to you at the same time. And after class write a short passage making use of the expressions underlined.

　　　　　　Expressions from COPERNICUS' REVOLUTIONARY THEORY

confuse one's mind, make sense, in the sky, punish...for..., suggest an idea, make the world, for that reason, move backward, go forward in a loop, appear bright, think long and hard about..., find an answer, collect observations of..., use one's knowledge to, show ...to..., make change to..., place...at the center of..., publish one's idea, be attacked by..., lie dying, reject one's theory, be against one's idea, build... on the base of..., replace the idea of..., fall to earth, create...as..., a direct link between...and... 4. Summing up theories

Next we shall do some scientific research: to sum up the two theories of the universe with the help of the text.

Before Copernicus' theory Showing Copernicus' theory The earth is the center of the universe. The earth is not the center of the universe. God makes the world. God does not make the world. ... ... 5. Writing a letter to Copernicus

(1)Reading about theories by Copernicus

1) The center of the Earth is not the center of the Universe, but only the center of the Earth's mass and of the lunar orbit.

2) All the planets move along orbits whose center is the Sun, therefore the Sun is the center of the World. (Copernicus was never certain whether the Sun moved or not, claiming that the center of the World is 'in the Sun, or near it.')

3) The distance between the Earth and the Sun, compared with the distance between the Earth and the fixed stars, is very small.

4) The daytime movement of the Sun is only apparent, and represents the effect of a rotation that the Earth makes every 24 hours around its axis, always parallel to