Virgin Galactic Unveils SpaceShip Two, Too

On Friday, Richard Branson unveiled Virgin Galactic's newest rocket plane: SpaceShipTwo, called the VSS Unity. Virgin Galactic is one of several companies that want to take humans to space. The flight plan is pretty dramatic: a large carrier aircraft called WhiteKnightTwo will carry Unity underneath, flying to an altitude of about 15,000 meters (50,000 feet). It releases Unity, which then ignites a rocket engine and thrusts upward to a height of more than 100 kilometers--the Kármán line, the a...