From the 1976 revised fourth draft script for Star Wars: BLUE LEADER Blue boys, this is Blue Leader. Adjust your selectors and check in. Approaching target at one point three parsec… This is as the X-wing squadron is veering around the planet Yavin to approach the Death Star. As you can see, Lucas uses "parsec" in the correct context here--as a unit of distance. So he did know full well what it actually meant. Surprised I've never seen anyone point this out. He was telling the truth all along. Hell, even I didn't really believe him!