两名美国宇航员威尔莫尔和威廉姆斯，原计划仅在太空停留8天，却意外滞留长达286天，这段“太空加班”经历引发了全球关注。北京时间3月19日凌晨5：57，迟归的“Crew-9”龙飞船，载着四名宇航员溅落在佛罗里达海岸附近，这一次漫长而充满争议的太空任务终于结束。
With the continuous improvement of education level among Chinese netizens， Chinese netizens who are proficient in physics have begun to raise questions:The moon also has a gravitational environment. Why didn't the American astronauts experience muscle weakness and inability to stand when they landed on the moon， considering the transition from the weightless environment of space to the gravity environment of the moon?
央视新闻报道 今天（9月28日）上午，中国航天员科研训练中心在重庆召开中国“第三届航天服技术论坛”。在开幕式上，中国载人航天工程办公室面向社会发布登月服征名活动，并首次公开中国登月服外观。登月服已经准备好了，那么登月航天员的情况怎么样呢？
