A 1:60 scale model of the Leonov, from the movie 2010: The Year We Make Contact.
Built to scale with my Discovery MOC, which you can also find on Rebrickable. The armature containing the habitat modules rotates, and is powered by an internal motor and gearing system.
I designed this in 2004, so it is uses old dark gray. I wouldn't be surprised if changes had to be made to build it in new dark bluish gray. Given the number of new pieces that have been released since then I'm sure some things could be improved considerably.