神舟二十一号｜神舟二十号有望刷新中国航天员乘组在轨驻留最长纪录

Core Points - The Shenzhou 20 mission is expected to set a new record for the longest duration of a Chinese astronaut crew in space, currently at 188 days [1] - Commander Chen Dong has become the first Chinese astronaut to exceed 400 days in space, completing six extravehicular activities, the highest number for any Chinese astronaut [1] - The crew has successfully conducted four extravehicular activities and seven payload operations, including the installation of space debris protection devices and equipment inspections [1] Space Science and Applications - The Shenzhou 20 crew has achieved significant results in various fields, including space life sciences, microgravity fundamental physics, space materials science, aerospace medicine, and new aerospace technologies [2] - Notable achievements include the production of high-quality protein crystals in space, which may provide potential targets for cancer treatment, and successfully heating tungsten alloy to 3100 degrees Celsius, setting a new record for international space materials science experiments [2] - The crew also discovered that charged colloids crystallize into long-lived metastable structures under microgravity conditions [2] Mission Preparations - The Shenzhou 20 crew is currently engaged in preparations for crew rotation and return [3]