Virgin Galactic has unveiled the world's first ever commercial passenger spaceship. The sleek black-and-white vessel represents a gamble with a sky-high price tag to create a commercial space and tourism industry. The company hopes the winged, minivan-sized SpaceShipTwo, will rocket space tourists into zero gravity within just two or three years.'This will be the start of commercial space travel,' Virgin founder and billionaire Sir Richard Branson said at the launch in California's Mojave Desert.