首次应急发射任务细节披露！

Core Points - The Shenzhou-22 spacecraft successfully launched on November 25, marking China's first emergency manned space mission in response to an anomaly with the Shenzhou-20 spacecraft [1][23] - The rapid response from the Chinese manned space program allowed for the emergency launch to occur just 20 days after the initial incident [1][10] Group 1: Incident Overview - On November 4, astronauts discovered a crack in the outer layer of the Shenzhou-20 spacecraft's window, suspected to be caused by space debris [3][5] - The damaged window posed a risk to the astronauts' safety during re-entry due to potential failure of thermal protection [5][7] Group 2: Decision-Making Process - Following simulations and tests, experts concluded that the risk of using Shenzhou-20 for re-entry was too high, leading to the decision to have the crew return on Shenzhou-21 instead [7][10] - The decision to switch spacecraft required extensive recalibration of flight plans and adjustments to astronaut seating and equipment [10][12] Group 3: Emergency Launch Preparation - The Chinese manned space program had pre-established emergency protocols, allowing for a backup spacecraft to be ready within 8.5 to 16 days [15][17] - The Shenzhou-21 mission was optimized for a quicker return, reducing the number of orbits from five to three [10][19] Group 4: Execution of the Emergency Launch - The Shenzhou-22 spacecraft was launched successfully after thorough preparations, including reassembling teams and ensuring all systems met heightened requirements [19][21] - The mission concluded with Shenzhou-22 docking with the Chinese space station, demonstrating the effectiveness of the emergency response protocols [23][24] Group 5: Future Implications - The successful emergency response serves as a practical test of the "one main, one backup" strategy and enhances the overall emergency response capability of the space program [24]