noun which may take the genitive case particle 'no'
interstellar
Used attributively with の to modify nouns, as in 恒星間旅行 (interstellar travel).
Interstellar navigation has not yet been realized.
Research on interstellar matter is advancing.
惑星間 means 'interplanetary', referring to space between planets within a star system, while 恒星間 refers to space between stars.
Compound of 恒星 (star) + 間 (between).