内容来源：https://www.engadget.com/science/space/artemis-ii-arrives-in-lunar-space-ahead-of-its-trip-around-the-moon-211919381.html?src=rss

内容总结：

“阿尔忒弥斯2号”进入月球轨道 人类将刷新深空最远纪录

美国东部时间4月6日下午2时45分左右，美国国家航空航天局（NASA）的“阿尔忒弥斯2号”载人飞船任务将启动绕月飞越的关键阶段。目前，飞船及其四名宇航员已成功进入月球“引力影响范围”，这意味着月球引力对飞船的作用已超过地球引力。此举标志着自1972年“阿波罗17号”任务以来，人类首次跨越地月边界。

在任务执行期间，宇航员里德·怀斯曼、克里斯蒂娜·科赫、维克多·格洛弗及加拿大宇航员杰里米·汉森将抵达距地球约252,757英里（约40.7万公里）的最远点，比1970年“阿波罗13号”机组保持的纪录再向前推进了约4,000英里。届时，人类将抵达前所未有的深邃太空。

飞越前夕，机组人员已完成多项准备工作，包括手动操控演示、科学目标复核以及应急生命支持系统的检查。在紧张工作之余，宇航员们也透过“猎户座”飞船的舷窗，凝视着遥远而壮丽的地球家园。

按计划，飞船将于4月6日午夜后抵达月球附近区域。当日下午，机组将正式刷新人类最远深空旅行纪录。在绕月飞越期间，飞船将短暂运行至月球背面，导致通讯暂时中断。预计飞船最近距离月球表面仅约4,066英里，宇航员将首次一览月球全貌，并有机会观测到持续约一小时的日食奇观。

NASA将从美国东部时间下午1时起对此次历史性飞越进行全程报道。

中文翻译：

"阿尔忒弥斯二号"进入月球空间，即将开启绕月之旅

4月6日美国东部时间下午2时45分左右，"阿尔忒弥斯二号"将启动月球背面飞越任务。这艘载有四名宇航员的飞船现已进入月球"引力影响范围"，意味着月球引力对飞船的作用已超过地球引力。这一转变发生在任务执行第四天六小时两分钟、距月球3.9万英里处。明天将迎来最关键阶段——飞船将绕行月球背面，将人类带入前所未有的深空领域。

宇航员里德·怀斯曼、克里斯蒂娜·科赫、维克多·格洛弗及加拿大宇航员杰里米·汉森抵达远地点时，距离地球将达252,757英里，比阿波罗13号机组保持的纪录再推进4,000余英里。他们是自1972年阿波罗17号登月任务以来，首批跨越月球边界的人类。

本周末机组人员为月球飞越进行了全面准备：开展手动操控演示、复核六小时观测期的科学目标、检测应急生命维持及返航所需的宇航服。当然，他们也饱览了壮丽宇宙奇观。航天局最新发布的系列照片中，宇航员们正透过"猎户座"飞船舷窗凝望地球。

"猎户座"飞船将于4月6日周一午夜刚过抵达月球附近区域。当天晚些时候，机组将抵达距地球最远位置，超越1970年阿波罗13号宇航员创下的248,655英里纪录。

月球观测期将于美国东部时间下午2时45分启动。数小时后飞船将进入月球背面，短暂失联。预计晚上7时02分抵达距月表4,066英里的最近点。美国宇航局表示："从这个距离，宇航员可同时观测月球全貌，包括南北极附近区域。"随后机组还将目睹日食奇观——"当猎户座飞船、月球与太阳连成一线，宇航员将看到太阳在月球背后隐匿约一小时。"美国宇航局将于东部时间下午1时起直播此次飞越任务。

【4月7日美国东部时间凌晨1时40分更新】本文已补充"阿尔忒弥斯二号进入月球引力影响范围"的最新动态。

英文来源：

Artemis II arrives in lunar space ahead of its trip around the Moon
The far side flyby will commence around 2:45 PM ET on April 6.
Artemis II and its four-person crew have entered the Moon’s “sphere of influence,” meaning the spacecraft is more affected by lunar gravity than the Earth’s pull. The transition occurred at a distance of 39,000 miles from the Moon, four days, six hours and two minutes into the mission. The next and most important phase will happen tomorrow when the craft loops around the Moon’s far side, taking humans deeper into space than they’ve ever been before.
At their apogee, Astronauts Reid Wiseman, Christina Koch, Victor Glover and Canada’s Jeremy Hansen will be 252,757 miles from Earth. That will break the previous record held by the Apollo 13 crew by just over 4,000 miles. They’re the first humans to cross the lunar threshold since 1972’s Apollo 17 moon landing mission.
The crew spent this weekend carrying out preparations for their lunar flyby. That included manual piloting demonstrations, reviewing their science objectives for the six-hour observation period and evaluating their space suits, which are there for life support in the event of an emergency and for their return home. But, they've had plenty of time to take in the views, too — and those views sure are spectacular. In the latest series of images shared by the space agency, the astronauts are seen gazing at Earth through the windows of the Orion spacecraft.
Orion will reach the moon's vicinity shortly after midnight on Monday, April 6. Later that day, the crew is expected to reach a point farther than any humans have traveled from Earth, surpassing the record of 248,655 miles from Earth set by the Apollo 13 astronauts in 1970.
The lunar observation period will start at 2:45PM ET, and a few hours later, they'll be behind the moon and briefly drop out of communication. The spacecraft's closest approach to the moon is expected to occur at 7:02PM, when it will be 4,066 miles from the surface. "From that distance, the crew will see the entire disk of the Moon at once, including regions near the north and south poles," according to NASA. The crew will later get a chance to see a solar eclipse "as Orion, the Moon, and the Sun align in such a way that the astronauts will see our star disappear behind the Moon for about an hour." NASA will have coverage of the flyby starting at 1PM ET.
Update April 7 at 1:40 AM ET: The post has been updated with news that Artemis II has entered the Moon’s sphere of influence.