Given the nature of this place, I would believe it. There's little they gain from lying about it.

[ The last few pieces of bread sit in his lap. When he moves to put it in his mouth, well -

It's impossible to not touch Eren when he raises his arm, so he switches to the one not currently pressed against the man's chest. ]

We had satellites and other machines that travelled small distances. People were limited to the Moon and nowhere else, though-

[ He shoves the last piece of bread into Eren's hand. ]

There is large station that hovers Earth. People go there for short periods of time to live and study space itself.