The Pacific Science Center has been hosting an exhibit called Star Wars: Where Science Meets Imagination.
It's filled with a bunch of movie props, models and costumes, plus some kind of science experiments that somehow relate the technology of the films to technology happening today. Or something like that. I mostly went to see the movie props, models and costumes.
The show is only around through May 8, so you have to act fast if you still want to see it. Tickets are available online at pacsci.org. And the show sells out everyday, so buying online is the only way to go.