Four astronauts are now inexorably bound for the Moon
摘要
猎户座飞船于周四成功启动主引擎，将四名宇航员送入绕月自由返回轨道，标志着阿尔忒弥斯二号任务进入关键阶段。此次变轨是飞船主引擎的最后一次主要点火，使宇航员将于周一绕月飞行，并借助月球引力返回地球，计划于4月10日在太平洋溅落。这是自1972年阿波罗任务后，人类再次超越近地轨道。
The Orion spacecraft successfully fired its main engine for 5 minutes and 50 seconds on Thursday, sending four astronauts on a free-return trajectory around the Moon. For NASA and the Artemis II crew members, this marked a point of no return for more than week.
Most Americans, indeed about three-quarters of the population around the world, have not witnessed humans leaving low-Earth orbit in their lifetimes. The last time this occurred was 1972, with the final Apollo Moon mission.
The “translunar injection” burn of Orion’s main engine occurred about one day after the successful launch of the mission on NASA’s Space Launch System rocket from Kennedy Space Center on Wednesday. This burn was the last major firing of Orion’s main engine, and sets the crew on a course to fly around the Moon on Monday, slingshot back toward Earth under lunar gravity, and splash down in the Pacific Ocean on Friday, April 10.
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