Q&A with Steve Clarke, deputy associate administrator for exploration in NASA’s science division (members only)

The launch of a SpaceX Falcon 9 rocket Aug. 24 from California delivered Taiwan’s Formosat 5 Earth-imaging satellite to orbit, and the Falcon’s first stage booster returned to landing on a drone ship downrange in the Pacific Ocean.

Aiming for reusability, Rocket Lab has demonstrated the mid-air recovery of a booster test article in a key test before rigging the first stage of the company’s Electron launcher with a parachute on missions beginning later this year.

SpaceX is readying two Falcon 9 rockets for a pair of flights nine hours apart Sunday from separate pads along Florida’s Space Coast. Weather permitting, the back-to-back departures Sunday would mark shortest span between two orbital-class launches from Cape Canaveral since 1966.