视频丨神舟二十号航天员乘组怎么回家？这份“返程指南”先睹为快

Core Points - The Shenzhou 20 astronaut crew is expected to return to the Dongfeng landing site this afternoon, with an animated demonstration provided to illustrate their journey home [1] Group 1: Key Actions During Return - The Shenzhou 21 spacecraft performed docking maneuvers at 19 meters and 200 meters, completing a 180-degree turn before entering the final phase of its return [3] - The first critical action involved a 90-degree rotation of the spacecraft, followed by the separation of the orbital module and the return module, completed within approximately two minutes [3] - The "blackout zone" occurs when the return module separates from the propulsion module at about 145 kilometers altitude, leading to a loss of radio communication due to atmospheric re-entry [4] Group 2: Descent and Landing Procedures - The third critical action involves deploying parachutes at an altitude of 10 kilometers, utilizing a three-stage parachute system to reduce descent speed to 7-8 meters per second [5] - The final landing action includes firing four retro-thrust engines when the return module is about 1 meter above the ground, allowing for a landing speed of approximately 2 meters per second [7]