“飞天战袍”护航深空探索（知与不知）

Core Points - The Shenzhou-20 crew successfully completed their third extravehicular activity, with astronaut Chen Dong setting a record for the most extravehicular activities by a Chinese astronaut, totaling six [2] - The extravehicular suit B worn by Chen Dong has supported 20 extravehicular missions, achieving the goal of "4 years and 20 times" lifespan extension, marking a significant milestone for China's space station [2][4] Summary by Sections Extravehicular Suit Performance - The second-generation "Feitian" extravehicular suit is designed for a lifespan of "3 years with at least 15 extravehicular activities" [3] - As of early 2024, the suit has approached the limit of "3 years and 15 times" usage, prompting a need for a lifespan assessment [3] - A scientific evaluation and health monitoring plan was developed to assess the remaining lifespan of the suit, which has been confirmed to be in good condition [3] Technological Advancements - The "Feitian" extravehicular suit represents advanced technology and is crucial for ensuring astronaut safety and operational efficiency during extravehicular activities [5] - The suit features a multi-layer design for protection against vacuum, radiation, and extreme temperatures, with various layers serving specific functions [5] - The suit's flexibility is enhanced by a bionic structure and integrated helmet and torso design, allowing for better movement [5][6] Future Developments - Two new second-generation "Feitian" extravehicular suits (D and E) have been delivered to the space station, with an improved operational lifespan of "4 years and 20 times" [4] - The development of the lunar suit is progressing well, with plans for a manned moon landing by 2030, leveraging technologies from the "Feitian" suit [7] - The design philosophy for future suits includes modularity, lightweight construction, and multi-purpose integration to meet diverse mission requirements [7][8]