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[ad_1] On this picture take from NASA video, astronauts Christina Koch, left, strikes away as Jessica Meir, proper, exits a hatch as they put together to put in batteries for the Worldwide House Station's solar energy grid throughout an area stroll, Monday, Jan. 20, 2020. Picture: AP A pair of spacewalking astronauts wrapped up battery enhancements exterior the Worldwide House Station on Monday, finishing a job begun final fall. NASA's Jessica Meir and Christina Koch put in the final new battery in a set of six launched to the orbiting lab in September. Additionally they eliminated two previous batteries of their second spacewalk in underneath every week to improve the station's solar energy grid. This marked the ladies's third spacewalk collectively. They performed the world's first all-female spacewalk final October, changing a failed charging system that bumped the battery replacements into this 12 months. The ladies had simply accomplished the battery work when Koch inadvertently deployed the hand controller on her emergency jet pack, referred to as a Safer. Meir hurried over to get the controller again in its correct place. Koch referred to as her "my hero." Mission Management cautioned that, given the present set-up, "we would not count on Christina's Safer" in an emergency. NASA's spacewalking astronauts at all times put on small Safer jet packs in case they develop into untethered from the station and float away. It is by no means been wanted. Throughout final Wednesday's spacewalk, Koch's helmet lights and digicam got here unfastened. She later discovered a defective latch within the helmet meeting and changed it earlier than floating out Monday. Koch has been aboard the area station for greater than 10 months, the longest single spaceflight by a lady. She returns to Earth in simply over two weeks. NASA step by step has been changing the area station's 48 growing older, original-style nickel-hydrogen batteries with new and extra highly effective lithium-ion batteries. Solely half as lots of the new batteries are wanted. To date, 18 new batteries have been put in over the previous three years and  36  previous ones eliminated. One other batch of six new batteries can be launched to the orbiting lab this spring to finish the ability improve. The previous batteries, in the meantime, can be discarded in a provide ship. These outsized, boxy batteries maintain all of the area station's methods working when the outpost is on the night time facet of Earth, drawing energy from the sprawling photo voltaic wings. They don't seem to be straightforward to deal with: Every is a few yard, or a meter, tall and broad, with a mass of about 400 kilos (180 kilograms.) "To our astro-sisters, we wish you the best of luck on this," astronaut Andrew Morgan radioed from inside Monday.  In all, 5 spacewalks had been wanted to finish the battery work this time round. Morgan and Italian astronaut Luca Parmitano will enterprise exterior Saturday to finish repairs to a cosmic ray detector on the area station. The science instrument's cooling system had to get replaced, an intricate job requiring 4 spacewalks. BK [ad_2] Source link