Watch our interview with two International Space Station astronauts

Throttling up to more than a million pounds of thrust at SpaceX’s Central Texas test facility, a Falcon 9 rocket booster recovered after a commercial satellite launch in May passed a key milestone Thursday as the company sets its sights on re-flying a used first stage on a mission this fall.

On its second test flight Tuesday, Astra’s privately-developed small satellite launcher ran out of fuel seconds before reaching the velocity needed to enter orbit but exceeded the company’s expectations with an otherwise-successful climb into space from Kodiak Island, Alaska.

For the final time, a SpaceX Dragon cargo capsule was released from the International Space Station’s robotic arm Tuesday and splashed down hours later in Pacific Ocean southwest of Los Angeles. Beginning later this year, SpaceX will fly upgraded Dragon freighters that will dock automatically with the space station and parachute into the Atlantic Ocean east of Florida.