What is suborbital spaceflight?
When a vehicle reaches space but does not achieve orbital velocity, it follows a parabolic arc and is said to have achieved suborbital spaceflight. Space Adventures’ suborbital spaceflights reach an altitude of at least 62 miles (100 kilometers), which is internationally defined by the Fédération Aéronautique Internationale (FAI), the world’s air sports federation, as the beginning of space. Suborbital spaceflights were first conducted by Alan Shepard and Virgil Gus Grissom in 1961 when they became the first two Americans in space.
