It means starship or interplanetary spaceship. Name of a science fiction spaceship.
It is not Spanish, although the translation "astronave" does not sound very good. See English/starship . It's the name they gave (until they changed it again) to a cargo rocket and passengers from the aerospace company SpaceX. And it's also the name of an American rock and pop band.
It's a spaceship. It is formed by the star voices ("star, star" ) ship ( "send, ship, boat" ) .