据专家介绍，空间站舱外航天服秉承着集约高效的原则，延寿的目的是最大化发挥舱外服在轨应用效能，节约工程成本。科研团队不仅要对空间站舱外航天 服进行寿命评估，构建天地联动、科学合理的舱外服健康监测和寿命评估方法体系，同时，系统识别寿命短板，便于后续服装寿命升级，从而达到既风险可 控又延长寿命的目的。 （央视财经《经济信息联播》）今天（12日），天舟九号货运飞船与长征七号遥十运载火箭组合体，垂直转运至发射区，计划于近日择机实施发射。天舟九 号要"快递"2套全新的飞天舱外服，据了解，这次新的舱外航天服，设计寿命由原来的3年15次提升为4年20次。事实上，目前中国空间站舱外航天服使用年 限次数已经超出了"3年15次"的寿命设计指标。为什么要"延寿"使用？舱外航天服的安全性又是如何保证的？ 转载请注明央视财经 编辑：潘煦 舱外航天服是航天员舱外活动过程中的核心装备，承担保障着航天员在舱外活动中的生命安全和高效作业。据了解，中国空间站舱外航天服是第二代"飞 天"舱外航天服，按照设计标准，使用寿命为"在轨贮存3年，期间出舱使用次数不小于15次"。 中国航天员科研训练中心 刘东岳：二代舱外服在使用寿命、安全可靠性、活动工效和测 ...

Core Viewpoint - The upcoming extravehicular activity of the Shenzhou-20 astronaut crew highlights the advanced technology and critical functions of the "Feitian" spacesuit, which serves as a life support and operational system in the harsh environment of outer space [1][3]. Group 1: Spacesuit Technology - The extravehicular suit is essentially a small manned spacecraft that provides life support and operational capabilities for astronauts in the vacuum of space [3]. - The suit features a gas-tight layer that maintains approximately 40 kPa pressure to simulate a pure oxygen environment, protecting against vacuum threats [4]. - It incorporates a multi-layer thermal structure and a water sublimation system, with up to six layers that reflect 90% of solar radiation and regulate internal temperature, crucial for managing the heat generated by astronauts [4]. Group 2: Life Support Systems - The prominent "backpack" of the spacesuit consists of two parts: the external suit's backpack structure and a large auxiliary pack, which includes primary and backup oxygen tanks and batteries, essential for life support and environmental control [5]. - This system ensures a continuous supply of oxygen while absorbing exhaled carbon dioxide, maintaining a fresh air environment for the astronaut [5]. - The backpack also features a temperature control system with a water tank and sublimation system to dissipate metabolic heat, functioning as an emergency toolkit for pressure adjustment, power supply, and communication [5]. Group 3: Significance and Impact - The "Feitian" spacesuit represents the culmination of Chinese aerospace engineering and innovation, symbolizing the nation's commitment to advancing human space exploration [5]. - Weighing approximately 130 kilograms on Earth, the suit allows astronauts to operate flexibly in the weightless environment of space, showcasing the effectiveness of its design [5]. - The suit not only serves as a protective gear but also embodies the technological prowess and determination of China's space program as it ventures deeper into the cosmos [5].

Core Points - The Shenzhou-20 manned spacecraft is scheduled for launch on April 24, 2023, with a crew consisting of Chen Dong, Chen Zhongrui, and Wang Jie, marking Chen Dong's return as commander after two years [1][3] - This mission is the fifth manned flight during the space station application and development phase and the 35th flight of the manned space program, focusing on in-orbit crew rotation, scientific experiments, and cargo operations [3][5] - The launch coincides with the 10th "China Space Day," adding significance to the mission as it celebrates the 55th anniversary of the successful launch of China's first artificial satellite, Dongfanghong-1 [5][6] Mission Objectives - The primary objectives include conducting scientific experiments, performing extravehicular activities, and installing space debris protection devices [3][10] - The Shenzhou-20 spacecraft will autonomously dock with the Tianhe core module approximately 6.5 hours after launch, forming a combination of three spacecraft and three modules [3][10] Crew and Training - The crew members Chen Zhongrui and Wang Jie are participating in their first flight, with backgrounds as an Air Force pilot and an engineer from the Aerospace Science and Technology Corporation, respectively [1][3] - The fourth batch of astronauts has been undergoing training since August 2024, with plans for them to join flight crews in the near future [8][13] Scientific Experiments - The Shenzhou-20 mission will conduct three life science experiments involving zebrafish, planarians, and streptomyces, focusing on the effects of microgravity on biological processes [9][10] - The previous Shenzhou-19 mission successfully implemented 88 projects across various scientific fields, including space life sciences and microgravity physics, achieving significant milestones [6][10] Future Plans - The manned lunar mission preparations are progressing well, with various components like the Long March 10 rocket and the Dream Chaser spacecraft under development [11][12] - There are ongoing discussions for international collaboration, including the selection of Pakistani astronauts to participate in missions aboard the Chinese space station [13]