标签：引力波
宇宙为何会膨胀？这让爱因斯坦非常“懊恼”！
我国古代先人非常有智慧，在汉代古书刘安的《淮南子·齐俗》中，就提到过“四方上下谓之宇，往固来今谓之宙”，简单来说宇是空间，宙是时间，所以宇宙学是一门研...
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