A SpaceX Falcon 9 rocket lights up the sky during a launch from the Cape Canaveral Air Force Station's Launch complex 40 early Friday morning, May 6, 2016, in Fla . Aboard is the JCSAT-14 communications satellite. SpaceX has done it again. For the second month in a row, the aerospace company landed a rocket on an ocean platform, this time following the launch of a Japanese communications satellite.  (Craig Rubadoux/Florida Today via AP)  NO SALES; MANDATORY CREDIT
A SpaceX Falcon 9 rocket lights up the sky during a launch from the Cape Canaveral Air Force Station's Launch complex 40 early Friday morning, May 6, 2016, in Fla . Aboard is the JCSAT-14 communications satellite. SpaceX has done it again. For the second month in a row, the aerospace company landed a rocket on an ocean platform, this time following the launch of a Japanese communications satellite. (Craig Rubadoux/Florida Today via AP) NO SALES; MANDATORY CREDIT Credit: Craig Rubadoux

CAPE CANAVERAL, Fla. — For the second month in a row, the aerospace upstart SpaceX landed a rocket on an ocean platform early Friday, this time following the successful launch of a Japanese communications satellite.

A live web broadcast showed the first-stage booster touching down vertically in the pre-dawn darkness atop a barge in the Atlantic, just off the Florida coast. The same thing occurred April 8 during a space station supply run for NASA. That was the first successful landing at sea for SpaceX.

Because of the high altitude needed for this mission, SpaceX did not expect a successful landing. But it was wrong. As the launch commentator happily declared, “The Falcon has landed.”