‘航天’ (háng tiān) literally combines ‘航’ (háng), meaning ‘to navigate’ or ‘to sail’, and ‘天’ (tiān), meaning ‘sky’ or ‘heaven’. Together, it refers to human activities involving flight beyond Earth’s atmosphere — especially spaceflight, spacecraft development, satellite launches, and crewed missions. It is the standard term used in official, scientific, and media contexts across China to describe aerospace endeavors.

Unlike the broader English word ‘aerospace’, which includes both atmospheric and space flight, ‘航天’ specifically emphasizes outer space operations — distinguishing it from ‘航空’ (háng kōng), which refers only to aviation within Earth’s atmosphere. The term carries national pride and technical prestige, frequently appearing in discussions of China’s space program, including missions to the Moon, Mars, and the Tiangong space station.