SpaceX said the test was a success, setting the stage for a launch late Thursday of a Dragon cargo spacecraft to the International Space Station.
One of the NASA astronauts training for commercial crew test flights said he expects the agency to make crew assignments for them as soon as this summer.
The launch will be the first to use a previously flown first stage, in this case a stage that launched a Dragon cargo spacecraft last April.
The Dragon, flying the CRS-10 cargo mission, splashed down in the Pacific Ocean southwest of Long Beach, California.
SpaceX Chief Executive Elon Musk announced Feb. 27 that the company is pursuing plans to launch two people on a Dragon spacecraft around the moon in late 2018.
A SpaceX Falcon 9 lifted off for the first time from a launch site at KSC previously used by Apollo and shuttle missions Feb. 19, placing a Dragon cargo spacecraft into orbit.
The first launch by SpaceX from an historic KSC launch pad will be delayed by at least a day after a technical problem scrubbed an attempted launch of a Dragon cargo spacecraft Feb. 18.
SpaceX said Feb. 17 that, other a technical issue with the upper stage of its Falcon 9 rocket, it is ready to perform its first launch from a historic launch pad here last used by the space shuttle more than five years ago.
It will be the first for SpaceX from Launch Complex 39A, previously used by the shuttle program.
SpaceX's Dragon cargo spacecraft is headed back to Earth from the International Space Station Aug. 26 with more than a ton of experiments and cargo bound for splashdown, including 12 mice.
A SpaceX Falcon 9 successfully lifted off early July 18 and placed a Dragon cargo spacecraft in orbit, while the vehicle’s first stage landed on land.
A SpaceX Falcon 9 rocket is ready to launch a Dragon cargo spacecraft to the International Space Station July 18, although a risk assessment has led NASA to decide to evacuate part of the center during the launch.