"We're only just now scratching the surface" of space exploration, Jim Bridenstine, who ran NASA during the Trump administration, said after Jeff Bezos' launch.

Two billionaires plan to both take their first spaceflights within days of eachother.

It is unclear who might join Whitson and Shoffner on their mission. An Axiom spokesman said that would be revealed at a later date. But recently, the Discovery Channel an...