Astronauts start 2nd spacewalk outside space station
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The three-month Shenzhou XII, the nation's seventh manned spaceflight, is part of the Tiangong program, which aims to complete a three-component station in a low-Earth orbit before the end of 2022.
Upon its completion, Tiangong will be manned regularly by groups of three astronauts in periods lasting several months. During handovers to new three-member crews, the station will accommodate up to six astronauts.