Updated 7:55 p.m. ET
The most expensive part of doing business in outer space is getting there. The private space flight company SpaceX thinks it can change all that, and Thursday's successful reuse of a rocket was a big test of its business model.
SpaceX launched a communications satellite from the Kennedy Space Center in Florida using a rocket stage that had already been to space and back. SpaceX is betting that this kind of recycling will lower its costs and revolutionize space flight.