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NASA astronauts Jessica Meir (left) and Christina Koch (right) put on their spacesuits as they prepare to leave the hatch of the International Space Station and begin the historical first-ever all-female spacewalk. The two ventured outside the International Space Station on Friday, Oct. 18, to replace faulty equipment on the station’s exterior. The astronauts replaced a faulty battery charge/discharge unit (BCDU) that failed to activate following the Oct. 11 installation of new lithium-ion batteries on the space station’s exterior structure. The BCDUs regulate the amount of charge put into the…
