The general idea is that these companies will be able to compete for contracts to deliver NASA science experiments to the surface of the moon by flying lunar landers on rocket launches purchased from other commercial space companies. Those individual contracts would substitute for NASA needing to build those capacities itself. But under this approach, NASA won't be alone in hiring these companies — the agency hopes to spur development that the commercial sector can also utilize. "We want to be first customers, not only customers," Thomas Zurbuchen, NASA's head of the science mission directorate, said during the event. The...