The game look like it could be one of the best things ever but until they confirm a few things it will probably become boring quickly.
I want to know about building fortresses and space stations and if I can see what other players have done, for example if someone dig out their own cave system and I come visit will I see that cave system or is it only there for that player because the world is randomly generated?
Does the game even remember what I have done if I go away and come back a week, a month or a year later?
Will you be able to see the coordinates for the planet you're on (and location on the planet) so you can tell a friend to come over?