Space is hard -- and no one understands that better than astronauts.
원문출처 : https://www.cnn.com/2021/06/20/world/nasa-spacewalk-sunday-solar-arrays-scn/index.html
원문출처 : https://www.cnn.com/2021/06/20/world/nasa-spacewalk-sunday-solar-arrays-scn/index.html