太空漫步全靠它！揭秘130公斤重的中国“飞天”航天服有多牛

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].