航天 hángtiān space flight
How to remember 航天: 航 vessel + 天 day = space flight.
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How it is used
- Spaceflight / aerospace (beyond the atmosphere) - 航天事业 (hángtiān shìyè) the space program, 载人航天 (zàirén hángtiān) crewed spaceflight.
- Note the distinction: 航天 = space, 航空 (hángkōng) = aviation within the atmosphere.
- Register: science, national achievement (中国航天).