Imagine how cool it would be if the "unknown objects" were actually alien stations or at least abandoned alien craft that could be found by players? That would provide a whole new incentive to sending missions into deep space. Sure, colonization will be a thing in KSP 2, which is AWESOME, but, as a UFO-head myself, I think the addition of "other-worldly" craft would be the cherry on top for me. This would open the door for lore to be added into the game, with info the player can find out about by investigating these objects in space. Anyone else hoping for this?
