This is a exploration starship, designed to land on unknown planets..... A the aft there is a all-terran vehicle, six wheels, with a deployable radar antenna, driven by two astronauts. The ship il crewed with four more astronauts. The vehicle plugs into the ship as you can see on the pics. The ship is quite strong, because she crashed from the stage I putted her on without breaking. after that some astronauts had a headhake but, as you know, lego minifigs don't complain a lot ;-)
I've been on a Classic Space kick lately and this is really well done! It definitely has the look of the official LEGO sets from the Classic Space theme. The overall shape is well done and I love the added playability that the six-wheeled vehicle brings. Nice work!