http://curious.astro.cornell.edu/about-us/150-people-in-astronomy/space-exploration-and-astronauts/general-questions/927-can-artificial-gravity-be-created-in-sp

http://curious.astro.cornell.edu/about-us/150-people-in-astronomy/space-exploration-and-astronauts/general-questions/927-can-artificial-gravity-be-created-in-space-intermediate http://curious.astro.cornell.edu/about-us/150-people-in-astr... tl;dr: it's trivial from a materials point of view, but hard from a "but you have to build it in space" point of view. We're still not great at building large structures in space.