宇宙旅行

1. Origins, structure, and basic meaning

• Structure: 宇宙旅行(うちゅうりょこう) means a journey into or through space.
• Basic usage: It describes a child writing an essay about space travel.
  • 子どもは宇宙旅行を題材に作文を書いた。

2. Common pitfalls and similar expressions

• Focus of 旅行 and 飛行
  • 宇宙飛行(うちゅうひこう) focuses on the activity of space flight. 宇宙旅行 views the journey as travel or an experience.