地壳到底有多厚?

• 作 者: 阿碧
• 出 处: 青少年科技博览
• 发表日期: 2006年Z1期
• 关键词: 厄拉多塞 钦博拉索 海拔高度 公元前三世纪 太平洋西部 卫星探测 引力波 不知道 终年积雪 磁波

有时,我们讽刺一个人狂妄无知会说他“不知道天高地厚”。其实,知道“天高地厚”是一个很难的问题,人类现在对于“地厚”的准确了解,也是最近几年的事情。地球的形状近似一个球体,那么,怎样测出它的半径呢?据说公元前三世纪希腊天文学家厄拉多塞内斯首次测出了地球的半径,他按

Sometimes we satirize a person who is arrogant and ignorant that he will say “he doesn’t know how thick the sky is.” In fact, knowing that “the height of the sky is high” is a difficult problem. The accurate understanding of “geosphere” by human beings is also a matter of recent years. The shape of the earth resembles a sphere, so how does one measure its radius? It is said that in the third century BC, the Greek astronomer Erado Zenis first measured the radius of the earth.