Branson’s Virgin Galactic is racing against Amazon creator Jeff Bezos’ Blue Origin to launch the first out-of-this-world passenger flight and take paying passengers into space.
Both companies will offer customers a weightless experience that will last just minutes, passing through the imaginary line marking where space begins — either the Karman line, at 100 kilometres, or the 50-mile (80.46km) boundary recognised by the US Air Force.
At this altitude, the sky looks dark and the curvature of the Earth can be seen clearly.
The first space tourists, who visited the International Space Station (ISS) in the 2000s, paid tens of millions of dollars for the privilege.