发射任务圆满成功！中国空间站将迎来“新成员”

Core Points - The Shenzhou-21 manned spacecraft successfully launched on October 31, 2023, carrying three astronauts and marking a significant achievement in China's space exploration efforts [1][3]. Group 1: Mission Overview - Shenzhou-21 is the sixth manned spacecraft in the application and development phase of China's space station and the first to utilize a 3.5-hour rapid rendezvous and docking plan, significantly improving autonomous docking capabilities [3][4]. - The new docking plan reduces the time from the previous 6.5 hours to 3.5 hours, decreasing the number of trajectory control maneuvers and flight circles, thus alleviating the astronauts' flight pressure and enhancing overall mission response capabilities [3][4]. Group 2: Technical Innovations - The mission's success relies on three key optimizations: precise launch and orbit control, reduced initial distance for close-range guidance, and unified optimization of flight trajectories, enhancing system fault tolerance and adaptability [4][5]. - The Long March 2F rocket underwent nearly 20 technical improvements to ensure the precision required for the rapid docking, including advanced control systems for better sensitivity and decision-making [5]. Group 3: Scientific Experiments - During the mission, 27 scientific and application projects will be conducted, including the first domestic space experiment with four SPF-grade C57BL/6 laboratory mice to study the effects of microgravity and confinement on their behavior [6][7]. - The experiment aims to explore the adaptive responses and stress reactions of mice in space, with potential implications for understanding human health issues related to space travel and terrestrial conditions [8].