space flight; space travel
Technical or formal term for traveling through space, often used in science fiction or aerospace contexts.
人類の航宙技術は急速に進歩している。
Human space flight technology is advancing rapidly.
彼は初の有
He succeeded in the first manned space flight.
astronavigator
Compound of 航 (navigation, sailing) and 宙 (space, mid-air). The exact origin is uncertain, but it likely emerged in the 20th century with the advent of space exploration.