noun
Loanword from English; used in the same sense as the English term, often in science fiction or technical contexts.
アウタースペースにはまだ多くの謎が残っている。
Many mysteries still remain in outer space.
Spelling with interpunct; sometimes used for clarity or in dictionaries.
宇宙 is the native Japanese word for 'outer space' or 'universe', more common in everyday and scientific contexts. アウタースペース is a loanword with a slightly more sci-fi or Western flavor.
Borrowed from English 'outer space'.