天大,地也大。但天地之大,还是有一定限度的。科学的发展让人们验证地球以及其他星球有多大已不再困难。而天空、空间虽在哲学意义上讲是无限的,无边无际的,但实际上只是一种推论,没人能证明它。不能因人找不到“天边”就说天没有边。也许天是有边的,在人类所观测到的边界再向 Big, big. But the world is big, there is still a certain limit. The development of science has made it no longer difficult for people to verify how big the earth and other planets are. The sky and space, though infinitely philosophical, boundless, are in fact only a corollary that no one can prove it. Can not find the sky because people can not say there is no edge. Perhaps heaven is boundless, redirected by the boundaries that humankind observes