Aurora Flight Sciences is expected to deliver the first four-engine twin-fuselage in 2025, with a capacity for 200 launches per year

Richard Branson's company jet concept will be able to carry up to 19 passengers at Mach 3 speed

Virgin Galactic's ship reached an altitude of 51.4 miles (82,720 meters) on Tuesday, March 13, a landmark recognized by NASA and the FAA as outer space