Why did the ancient Greeks believe that the Earth was the centerof the universe?
为什么古希腊人坚信地球是宇宙的中心呢？
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The wisdom of the day was derived from Ptolemy, an astronomer of the second century, whose elaborate system of the sky put Earth at the centerof all heavenly motions.
当时的智慧来自于二世纪的天文学家托勒密，他的复杂天空体系把地球置于所有天体运动的中心。
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The wisdom of the day was derived from Ptolemy, an astronomer of the second century, whose elaborate system of the sky put Earth at the centerof all heavenly motions.