https://blog.wongcw.com/2022/07/01/relativity-space%e8%88%87oneweb%e7%b0%bd%e7%bd%b212%e5%84%84%e7%be%8e%e5%85%83%e7%9a%84terran-r%e7%81%ab%e7%ae%ad%e7%99%bc%e5%b0%84%e5%8d%94%e8%ad%b0/