神舟二十号飞船安全顺利返回东风着陆场 中国空间站太空应急行动主要任务圆满完成

Core Viewpoint - The Shenzhou-20 spacecraft successfully returned to the Dongfeng landing site on the 19th, marking the completion of the main tasks for China's space station emergency operations [1]. Group 1: Mission Success - The Shenzhou-20 spacecraft's return capsule landed successfully at 9:34 AM, with overall normal conditions confirmed for the capsule's exterior and good status for the items inside [1]. - The spacecraft was launched on April 24, 2025, from the Jiuquan Satellite Launch Center and docked successfully with the space station [1]. - The spacecraft spent 270 days in orbit, validating its capability for a 9-month stay [1]. Group 2: Risk Mitigation - To reduce return risks, astronauts from the Shenzhou-21 crew conducted close-up photography of the Shenzhou-20 capsule's window using a high-definition camera [1]. - A window crack treatment device was developed and installed by astronauts inside the Shenzhou-20 spacecraft to enhance thermal protection and sealing during the return process [1]. Group 3: Emergency Response - Following the discovery of potential damage to the Shenzhou-20 capsule's window, the mission command quickly organized simulation analyses and experimental verifications, leading to an adjustment of the mission plan and the activation of an emergency response [2]. - The Shenzhou-21 crew returned safely on November 14, 2025, and the Shenzhou-22 spacecraft was launched as an emergency response on November 25, marking the first emergency launch in China's manned space history [2]. - The Shenzhou-23 spacecraft, which will take over the rolling backup task, has arrived at the Jiuquan Satellite Launch Center, with the Long March 2F Yao-23 rocket set to be launched soon [2].