n.宇（宙）航（行）学；（恒）星际航行学

The Soviet Union made significant contributions to the early development of cosmonautics.
苏联在航天事业的早期发展中做出了重大贡献。
Yuri Gagarin, the first human in space, is a legendary figure in the history of cosmonautics.
尤里·加加林，第一个进入太空的人，是航天史上的传奇人物。
The International Space Station is a collaborative project that advances global understanding in cosmonautics.
国际空间站是一个推进全球航天领域理解的国际合作项目。
Many young people dream of becoming cosmonauts and exploring the vast expanse of the universe.
许多年轻人梦想成为宇航员，探索浩瀚的宇宙。
The cosmonautics museum houses artifacts from various space missions, inspiring future generations.
航天博物馆收藏了来自不同太空任务的文物，激励着未来的几代人。
The development of new rocket technologies is crucial for the advancement of cosmonautics.
开发新的火箭技术对于航天事业的发展至关重要。
Astronauts and cosmonauts undergo rigorous training to prepare for the physical and mental challenges of spaceflight.
宇航员和航天员要接受严格的训练，以应对太空飞行的身心挑战。
The study of cosmonautics includes understanding the effects of zero gravity on human biology.
航天学的研究包括了解零重力对人类生物学的影响。
The first satellite launch marked a milestone in the history of cosmonautics.
第一颗卫星的发射标志着航天史上的一个里程碑。
Collaborative international efforts in cosmonautics have led to groundbreaking discoveries and advancements.
航天领域的国际协作已带来了突破性的发现和技术进步。