Didn't they kind of say that the ship is Quantum entangled or something as to how the ship is in two places at once? Either way the moon bunnies told the WoL not to think too hard about that. Just now anyone who wants to know how it is to visit Ultima Thule can do so.

The one thing the game doesn't explain is how we grow and un grow while traveling to and from Elpis. Unless we want to say any time you pass the point in time the sundering you end back being small or something. While when you go back the other way whatever Emet Selch did to make you more solid and bigger kicks into effect each time.