通过哈勃太空望远镜,人类最远已经能够看到距离地球140亿光年的天体,人类发射的各种太空探测器已经成功造访了太阳系的七大行星,人类的足迹甚至已经印在了月球上。然而,我们对自己脚下的地球却知之甚少。地心究竟有什么?为什么说“上天容易入地难”?让我们循着科学家的思路去探究深藏地心的秘密。 Through the Hubble Space Telescope, human beings have been able to see as far as 14 billion light-years away from the Earth’s celestial bodies. Various space probes launched by mankind have successfully visited the seven major planets in the solar system and human footprints have even been printed on the moon . However, we know little about the Earth at our own feet. Why geocentric? Why say “Heaven is easy to enter the earth difficult”? Let us follow the scientist’s ideas to explore the secret deep geocentric.