I'm not an expert in judging whether a series is more Science Fiction than Fantasy, but I know that Star Wars did have some science laced into it's theme. For instance, the tie fighters used ion engines, or ionized gas for propulsion in space. Not too long ago, NASA launched a probe that is propelled by ionized xenon gas. DAWN, launched in 2007 uses three ion engines to propel itself to the dwarf planet Ceres and later the asteroid Vesta. The ion engine allows for accelaration from 0 to 60 mph in four day. DAWN is not the first probe to utilize ion engines and NASA has made significant progress with ion engines. There has even been testing of laser based ion engines. Lasers and hover craft have provided the United States airforce with some interesting uses on fighter jets. And there's more science used throughout the story lines.