The Scaled Composites Model 339 SpaceShipTwo was an air-launched suborbital spaceplane type designed for space tourism. It was manufactured by The Spaceship Company, a California-based company owned by Virgin Galactic. From Wikipedia
Veteran space scientist Alan Stern, along with two others, participate in microgravity research and data collection on Virgin Galactic's Fifth commercial suborbital flight amidst ongoing space tourism competition with Blue Origin.
