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So between 1510 and 1514 he worked on it, gradually improving his theory until he felt it was complete.
于是，他在1510至1514年期間從事這項研究，逐步修改他的理論，直到他感到完善時為止。
In 1514 he showed it privately to his friends.
1514年，他把他的新理論私下里給他的朋友們看。
The changes he made to the old theory were revolutionary.
他對舊理論的修改是具有革命性的。
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.
他把太陽固定在太陽系的中心位置上，而行星則圍繞著太陽轉，只有月球仍然繞著地球轉。
He also suggested that the earth was spinning as it went round the sun
他還提出地球在圍繞太陽轉的同時，它本身還自轉，
and this explained changes in the movement of the planets and in the brightness of the stars.
這樣就說明了行星運動的變化情況以及星球亮度問題。
His friends were enthusiastic and encouraged him to publish his ideas, but Copernicus was cautious.
他的朋友都熱情地鼓勵他把他的想法公之于世，而他卻小心謹慎，。
He did not want to be attacked by the Christian Church, so he only published it as he lay dying in 1543.
他不想遭到基督教會的攻擊，所以他直到1543年臨終之前才公布了這一觀點。
Certainly he was right to be careful.
當然，他小心謹慎是對的。
The Christian Church rejected his theory, saying it was against God's idea and people who supported it would be attacked.
基督教會拒絕接受他的理論，說這種理論違背了上帝的旨意，而支持這種理論的人都會受到打擊。
Yet Copernicus' theory is now the basis on which all our ideas of the universe are built.
然而哥白尼的理論卻是我們宇宙觀賴以建立的基礎。
His theory replaced the Christian idea of gravity, which said things fell to earth because God created the earth as the centre of the universe.
他的理論還改變了基督教對地心引力的看法，他們認為物體往地球上掉落是因為上帝創造了地球，而地球正是宇宙的中心。
Copernicus showed this was obviously wrong.
哥白尼表明這是明顯錯誤的。
Now people can see that there is a direct link between his theory and the work of Isaac Newton, Albert Einstein and Stephen Hawking.
如今人們可以看到，他的這些想法與艾薩克·牛頓、阿爾伯特·愛因斯坦以及斯蒂芬·霍金等人的研究都有著直接的聯系。
