Early Wednesday, NASA astronauts Chris Cassidy and Robert Behnken began a spacewalk outside of the International Space Station to replace lithium ion batteries for one of the station's power channels. It is expected to last for seven hours.
원문출처 : https://www.cnn.com/2020/07/01/us/nasa-july-spacewalk-cassidy-behnken-scn-trnd/index.html
원문출처 : https://www.cnn.com/2020/07/01/us/nasa-july-spacewalk-cassidy-behnken-scn-trnd/index.html