描述: 航天器是为在外太空旅行而建造的飞行器。通常是通过某种火箭发动机推进，向一个方向喷射气体或等离子体，以向反方向加速。不载人的航天器称为非载人航天器或机器人航天器，例如用于探索的各种卫星、太空望远镜或太空探测器。另一方面，载人航天器需要为其乘员提供生存条件，例如大气增压、辐射防护和温度调节。可以返回地球的航天器称为可回收航天器；回收后可以再次发射的航天器称为可重复使用航天器。旨在提供长期基地（如在地球轨道上）的航天器称为空间站。

相关词条

• 火箭
• 人造卫星
• 空间站
• 太空望远镜

词条和定义状态： 该术语的英文原始定义已通过天文研究人员和教师的审核
该术语及其定义的译文仍待审核

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