【英语时差8,16】希腊人最先发现地球是圆的（下）（在线收听）

However, Aristotle noticed that when you are down south in Egypt, the north star is close to the horizon. When you are up north in Greece again, it’s high in the sky. How Is That Possible, Since The North Star Is Supposed To Stay Put? It’s possible, Aristotle concluded, only if the earth is round. Think of it this way…When you are standing at the north pole, where is the north star? Directly overhead. Now place yourself at the equator. Where is the north star? Yep–it’s down on the horizon, because you have traveled along a curve. Go even farther south and you won’t be able to see it at all; the earth will hide it. Go farther north and it seems to rise higher and higher.