I'll be sure to keep that in mind. I want to keep exploring what I can with the void. I'm tempted to look at the train too, but not while we're on it, obviously.

[ That sounds like a project for another day. He'd be fascinated in seeing what the train was made of for interstellar travel. ]

Space travel- [ to get back on topic ] involves remaining in the same world, but leaving the surface of the planet and heading up into the sky. Those stars you see, the moon, they're all out in space. The moon in particular, humans have landed on it before in 1969.