https://blog.wongcw.com/2018/12/06/seti%ef%bc%9a%e6%9c%aa%e7%99%bc%e7%8f%beoumuamua%e7%b5%a6%e6%88%91%e5%80%91%e7%99%bc%e4%bf%a1%e8%99%9f/