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Continue to Chat天王星為何90°躺倒自轉?研究稱其或遭到了地球兩倍大小的物體撞擊 https://blog.wongcw.com/2018/12/26/%e5%a4%a9%e7%8e%8b%e6%98%9f%e7%82%ba%e4%bd%9590%e8%ba%ba%e5%80%92%e8%87%aa%e8%bd%89%ef%bc%9f%e7%a0%94%e7%a9%b6%e7%a8%b1%e5%85%b6%e6%88%96%e9%81%ad%e5%88%b0%e4%ba%86%e5%9c%b0%e7%90%83%e5%85%a9/