神20返回舱受损细节公布：玻璃裂纹是个三角形，整个玻璃从内到外已贯穿；“神舟二十二号航天员乘组”在序列中永远空缺

Core Viewpoint - The article discusses the emergency response and subsequent actions taken by China's space program following the discovery of a crack in the Shenzhou 20 spacecraft's window, highlighting the challenges faced and the successful implementation of an emergency launch plan. Group 1: Incident Overview - On November 5, 2025, the Shenzhou 20 mission was put on hold due to a discovered crack in the spacecraft's window during a routine inspection [2] - The crack was identified as a triangular shape and confirmed to be a through-crack, raising safety concerns for the spacecraft's return [4][5] - The decision to delay the mission was made within 12 hours of confirming the crack, prioritizing safety above all [5][11] Group 2: Emergency Response - An emergency plan was activated, involving extensive simulations and tests to assess the safety of the cracked window during re-entry [11] - A special review meeting concluded that Shenzhou 20 could not safely return, leading to the activation of backup spacecraft [15] - The backup spacecraft, Shenzhou 21, was chosen for the return of the crew, while Shenzhou 22 was prepared for an emergency launch [17][18] Group 3: Launch and Recovery - On November 14, 2025, Shenzhou 21 successfully landed, allowing the crew of Shenzhou 20 to return safely after a 20-day emergency period [20][21] - Shenzhou 22 was launched on November 25, 2025, marking China's first emergency launch mission, equipped with supplies and a device to address the window crack issue [22][27] Group 4: Future Considerations - The incident highlighted the increasing threat of space debris, prompting the need for enhanced protective measures for spacecraft [26] - The production schedule for future spacecraft has been accelerated, with Shenzhou 23 expected to be completed two months early [27] - The absence of a crew for Shenzhou 22 serves as a reminder of the continuous need for vigilance and improvement in the space program [28]