Not sure what to do with yourself as you look out that window hour upon hour upon hour? There’s nothing better than a little existential thought to crack that nut. Let’s start with the nihilistic captain himself, Friedrich Nietzsche:

“Whither is God” he cried. “I shall tell you. We have killed him – you and I. All of us are his murderers. But how have we done this? How were we able to drink up the sea? Who gave us the sponge to wipe away the entire horizon? What did we do when we unchained this earth from its sun? Whither is it moving now?”

“Whither are we moving now? Away from all suns? Are we not plunging continually? Backward, sideward, forward, in all directions? Is there any up or down left? Are we not straying as through an infinite nothing? Do we not feel the breath of empty space? Has it not become colder?“

From Nietzsche’s Parable of the Madman