To qualify for the F.A.A.’s distinction, a person had to reach an altitude of 50 miles — reflecting the earlier US Air Force practice — and one had to be considered as part of “the flight crew,” which the federal agency defines as: Any employee or independent contractor of a licensee, transferee, or permittee, or of a contractor or subcontractor of a licensee, transferee, or permittee, who performs activities in the course of that employment or contract directly relating to the launch, re-entry, or other operation of or in a launch vehicle or re-entry vehicle that carries human beings. Everyone else who goes to space is, in the F.A.A.’s view, just a “spaceflight participant,” not an astronaut. After the wings were awarded to Melvill and Binnie, the F.A.A. did not award any other commercial astronaut wings until 2019, to Mark Stucky and Frederick W. Sturckow, the two pilots of Virgin Galactic’s larger successor of SpaceShipOne, aptly named SpaceShipTwo. Two other Virgin Galactic pilots received wings on the next SpaceShipTwo flight, as did Beth Moses, the company’s chief astronaut instructor, who evaluated the crew cabin.