• Ex-NASA astronaut: US should pressure China on rocket reentry protocol
• This is not the first time space debris has fallen to Earth
• Opinion: Space junk is becoming a massive problem
원문출처 : https://www.cnn.com/2021/05/08/app-international-edition/china-space-debris-long-march-rocket-reentry-scn/index.html
원문출처 : https://www.cnn.com/2021/05/08/app-international-edition/china-space-debris-long-march-rocket-reentry-scn/index.html