From everything I have seen thus far, it seems they are indeed kept in a Tardis-type never-ending pocket. I have yet to see anywhere if there are limits of any kind. Cargo seems to be for "goods" and not resources. Resources are also not ship dependent - very much like you say with it being in your pocket, where-as cargo is stored in your ships cargo hold with limited space.Another thing I found out last night: Do not obscure (even the slightest part) of thrusters. If you do, that direction will not work. I found this was why my braking thrust was shit - I had ever so slightly (by like, a hairs width) blocked a forward facing thruster and it was not firing. After I removed said obstruction, it worked as intended.
Last thing: You can add Energy Generators to your ship with Titanium (no Iron equivalent) to help in situations where you are not generating enough energy. I'd wager these are better than Solar Panels, but heavy so keep them small.
Last edited 27 Apr at 10:13:48.