Even though Terra Venture travels through deep dark outer space, its domed dwellings contain clouds and receive uni-directional sunlight (revealing the exterior filming that it actually is). There should never be any clouds, the sky should always be black (unless passing near another sun), and bright light should be artificial and multi-directional.
Aside from the far-fetched impracticality of Terra Venture taking an entire modern city with them into space, one of its side domes contains several mountains - as if whatever planet they wind up colonizing might not have any.