必修5 Unit 1 Using Language(17)

人教版必修5 Unit 1 Using Language

5. How did he explain changes in the movement of the planets and in the brightness of the stars? When did he publish his idea? (Para 4) He placed a fixed sun at the centre of the solar system with the planets going round it and only the moon still going round the earth. He also suggested that the earth was spinning as it went round it and this explain changes in the movement of the planets and in the brightness of the stars. He published his idea as he lay dying in 1543.

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