恒星 こうせい かん宇宙 うちゅう せんでしょう
kō seikan'uchūsendeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 恒星間宇宙船

1. Probably an interstellar spaceship.

Polite
Presumptive
Conjecture