Astronauts upgrade station power system in six-hour spacewalk

January 14, 2017
Two astronauts floated outside the International Space Station on Friday for a six-hour spacewalk to replace aging batteries for the laboratory's solar power system, an upgrade needed to keep the outpost running into the next decade, NASA said.

U.S. astronaut Shane Kimbrough left the station's airlock at about 6:30 a.m. EST...

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