It is easy to understand why the Greeks ..-阿摩線上測驗
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2F 我愛阿摩,阿摩愛我 (2013/01/19)
It is easy to understand why the Greeks found geocentric cosmology so appealing. Night after night, we see celestial objects moving across the sky from east to west. Wouldn’t it be natural to assume that the Earth lies motionless at the center of the universe and that the Sun, the moon, planets, and stars revolve around it? In the 4th century B.C., Plato postulated a world system with the stationary Earth as its hub and a huge outer space that carried the planets and stars in its daily revolution. But his two-sphere configuration could not account for a particular motion of certain planets. A... 查看完整內容 |