US rocket company SpaceX completed back-to-back launches at the weekend.
Late on Friday, it used one of its refurbished Falcon 9 vehicles to put up a Bulgarian satellite from Florida.
Then on Sunday, SpaceX lofted another 10 spacecraft for telecommunications company Iridium. This time, the rocket flew out of California.
Both missions saw the Falcon first-stages come back to Earth under control to drone ships that had been positioned out on the ocean.
It means SpaceX has now had 13 landing successes for those missions it has sought to recover the booster. That said, Friday’s first-stage had a particularly hard landing, and looked bent over on the live video feed.
“Rocket is extra toasty and hit the deck hard (used almost all of the emergency crush core), but otherwise good,” quipped SpaceX chief executive, Elon Musk, on Twitter.
His firm does not expect to recover every booster, because the flight profile required on many satellite launches will lead to re-entry speeds that are simply too fast to curtail with the available propellant.
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SOURCE: BBC News, Jonathan Amos