美载人绕月飞行任务综合演练中止 发射推迟至3月

Core Points - NASA conducted a comprehensive rehearsal for the Artemis 2 crewed lunar flyby mission, which included critical operations such as propellant loading and launch countdown procedures. However, the countdown was halted due to a liquid hydrogen leak at the rocket's core stage [1] - The rehearsal aimed to identify and resolve potential issues to ensure the successful execution of the launch mission. NASA will review the test data and address the problems encountered during the rehearsal before determining the official launch date [1] - The Artemis program was announced in 2019, with Artemis 1 successfully completing an uncrewed lunar flyby test in November 2022. The Artemis 2 mission will involve four astronauts aboard the Orion spacecraft for approximately 10 days of lunar flight [2] Summary by Sections Rehearsal Details - The rehearsal included low-temperature liquid hydrogen loading into the Space Launch System and countdown procedure drills. Multiple pauses were required to address the liquid hydrogen leak, which delayed the countdown process [1] - Additional issues included the need to retighten the pressure valve of the Orion crew module after recent replacement, which took considerable time, and low-temperature effects on some cameras and equipment, as well as intermittent audio communication issues with the ground team [1] Mission Timeline - Following the rehearsal, NASA decided to shift the launch window from February to March, acknowledging that challenges were expected given that it has been over three years since the last launch of the Space Launch System [1] - After the completion of the Artemis 2 mission, NASA plans to advance the Artemis 3 crewed lunar landing mission [2]