Richard Branson is scheduled to blast off this Sunday on a suborbital space flight with his company Virgin Galactic, just days before Jeff Bezos plans to ride aboard a Blue Origin spaceship. But a lot more is riding on these rockets than ambitious billionaires.

Axios Re:Cap speaks with Axios Space editor Miriam Kramer about what Branson and Bezos are actually doing, how it’s different from what SpaceX is doing, and the risks these missions could pose for the future of space travel.