cosmonautics

例句：

1. 1. Cosmonaustics is the study of space exploration.
   宇宙航行学是研究太空探索的学科。
2. 2. The astronauts are preparing for their next mission in cosmonaustics.
   宇航员们正在为他们的下一次宇宙航行任务做准备。
3. 3. Cosmonaustics has made great strides in developing new technologies for space travel.
   宇宙航行学在开发新的太空旅行技术方面取得了巨大进展。