NASAのインスタグラム(nasa) - 5月4日 01時38分

"Space is dark and dangerous," tweeted astronaut Rick Mastracchio on April 26. He also wrote, "Here we are exiting airlock. Helmet lights work well at short distance." Mastracchio and his crewmate Steve Swanson completed a short spacewalk April 23 to replace a failed Multiplexer/Demultiplexer back up computer. The backup computer failed April 11 after a routine health check by the Mission Control team in Houston. While the primary computer continued to operate flawlessly NASA managers ordered the spacewalk repair to ensure redundancy on critical systems.
Image Credit: NASA

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