The crew can look forward to going home on completion of their tour of duty. These lines of thought are no different from what serious futurologists predicted and went completely unchallenged until the work of Professor Gerard K. O'Neill. After some initial research was done, it seemed that the best place for our technological civilization is not on Earth or even on a planetary surface. A space habitat, orbiting in free space, would seem to have many advantages over any planetary home. A space habitat will most likely be in the form of a sphere pressurized with air and spinning to simulate gravity.
Sunlight is brought in with mirrors and windows.
The interior can be landscaped to look very much like Earth. The moon will provide oxygen, silicon, aluminum, and titanium. The asteroids can supply carbon, hydrogen, and nitrogen. When the calculations were finished, it seemed evident that planets actually represent the hard way to go about doing things. A planet uses a tremendous amount of mass to create a gravity field and hold down an atmosphere, while a simple rotating, pressurized structure can achieve much the same effect.