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航天服是航天员升空与返回时为防止事故而穿着的服装,例如在升空发生事故,航天员即使被抛到真空的宇宙中,航天服中氧气瓶中的氧气可供航天员使用几十分钟,且具有防寒隔离功效,为此,航天服具有气密性,头部与手腕的转动均不会漏气,这样一来就使航天服的穿脱非常费劲。日本航天员毛利卫说,穿航天服是很辛苦的,头部很难套入,又很重,航天服重20～30千克,再套上降落伞,重量会达到40多千克,穿好航天服得练20次,一个人很难自己穿上,升空时可由别人帮助穿上,而返回时只好由航天员之间互相帮助穿戴,可是在失重状态下这可不是一件容易的事。
Spacesuits are clothing worn by astronauts to prevent accidents when going up and returning. For example, in the event of a launch accident, astronauts use oxygen from oxygen bottles in spacesuits for astronauts even if the astronauts are thrown into the vacuum universe Ten minutes, and has a cold isolation effect, therefore, the space suit has airtightness, the head and wrist rotation will not leak, thus making the spacesuit wear off very strenuous. Japanese astronaut Maori Lee said that space shuttle service is very hard to wear, the head is difficult to set into, and heavy, space-weight 20 to 30 kg, and then put on a parachute, the weight will reach 40 kg, wearing a space suit Practicing 20 times, it’s hard for a person to put on his own, and can be helped by someone else when going up. However, he has to help each other astronauts to wear on return, but this is not an easy task under weightlessness.