太空 (tài kōng) means “outer space”. It is an HSK 6 Chinese word in the HSK 3.0 vocabulary.
Practice each character:
宇航员在太空中工作。
Yǔhángyuán zài tàikōng zhōng gōngzuò.
Astronauts work in outer space.
Updated: 2026-05-27