"Aliens travel through outer space by spaceship."

Translation: Romvesener reiser gjennom verdensrommet med romskip.

[kaisuteknon]

If you're going to write "outer space", and not "space", then the direct-ish translation "det ytre rom" works perfectly fine.

[alek_d]

We'll accept it.

[kaisuteknon]

Thank you!