Late this month, if everything goes according to plan, Space Exploration Corporation, or SpaceX for short, will launch its privately funded two-stage rocket, Falcon I, into low-Earth orbit, carrying with it the U.S. Department of Defense’s TacSat-1 satellite. The ride costs just under $6 million, a price that undercuts the competition by up to two thirds. â€We want to be the Southwest Airlines of space launches,†says SpaceX CEO and PayPal founder Elon Musk.