宇宙飛行士

1. Origins, structure, and basic meaning

• Structure: 宇宙飛行士 (うちゅうひこうし) combines space 宇宙, flight 飛行, and trained person 士 to mean astronaut.
• Basic usage: It denotes a professional trained for tools and tasks in weightlessness and can also be a child's future ambition.

2. Common pitfalls and similar expressions

• A trained crew member, not merely a passenger
  • 宇宙飛行士 centers on professional preparation for spaceflight and mission duties rather than tourism alone.