Wordiyoastronautics
🇬🇧 UK/æstrə'nɔːtɪks/🇺🇸 US/.æstrә'nɒ:tiks/
C2
Definitions
n.
The science and technology of space flight and navigation beyond Earth's atmosphere.
航天学；宇宙航行学
The science and technology of space flight and navigation beyond Earth's atmosphere.
航天学；宇宙航行学