“飞船舷窗出现裂纹，应急20天”，细节披露

Core Viewpoint - The article discusses the emergency response of China's space program following the discovery of a crack in the Shenzhou 20 spacecraft's window, detailing the efficient measures taken over 20 days to ensure the safety of the astronauts and the subsequent emergency launch of Shenzhou 22. Group 1: Incident Discovery and Initial Response - On November 5, 2025, the Shenzhou 20 mission was abruptly paused due to a discovered crack in the spacecraft's window during a routine inspection [1] - The astronauts conducted detailed photography of the crack from various angles, and experts from over ten domestic glass-related industries were organized to assess the damage [3] - The crack was confirmed to be a penetrating type, raising significant safety concerns for the spacecraft's return [6][8] Group 2: Safety Assessment and Decision-Making - The decision to delay the return was made within 12 hours of confirming the crack, prioritizing safety above all [10] - A thorough safety assessment of the crack was initiated, including a review of the manufacturing process and testing data of the window [12] - The assessment concluded that the most likely cause of the crack was space debris, emphasizing the need for enhanced protective measures against such threats [14][88] Group 3: Emergency Launch Preparations - The emergency launch protocol was activated, with Shenzhou 21 already on standby, allowing for a quick response to the situation [24] - The astronauts were to return on Shenzhou 21, with the decision made to launch Shenzhou 22 for a 16-day emergency mission [48][66] - The launch of Shenzhou 22 was successfully executed on November 25, 2025, marking China's first emergency launch in its manned space program [81] Group 4: Operational Challenges and Solutions - The launch preparations required coordination with ongoing satellite missions, necessitating efficient resource management at the launch site [68][70] - The Shenzhou 21 spacecraft utilized a new three-orbit rapid return mode, reducing the return time by over three hours compared to traditional methods [55] - The ground control team implemented extensive simulations and tests to ensure the safety and reliability of the new return parameters [57] Group 5: Post-Mission Analysis and Future Implications - The successful return of the Shenzhou 21 astronauts highlighted the importance of risk awareness and emergency preparedness in manned space missions [49] - The incident underscored the increasing threat of space debris, prompting a reevaluation of spacecraft design and protective measures [90] - The next crew will be designated as the "Shenzhou 23 astronaut team," leaving the "Shenzhou 22 astronaut team" as a permanent absence in the sequence, serving as a reminder of the ongoing challenges in space exploration [92][94]