Most of us are very familiar with the idea that our planet is nothing more than a tiny speck orbiting a typical star, somewhere near the edge of an otherwise unnoteworthy galaxy.

• 我们当中的大多数人都熟知我们的星球在宇宙中只不过是一个普通星系某个边缘处绕着一颗典型恒星旋转的小斑点而已。