Live coverage: Irma knocks out power at Kennedy Space Center

Stormy weather near NASA’s Kennedy Space Center kept SpaceX’s Falcon 9 rocket on the ground Thursday, delaying liftoff of a commercial supply ship with equipment and experiments for the International Space Station until Saturday.

An Ariane 5 rocket has blasted off from a tropical launch pad in French Guiana on nearly 3 million pounds of thrust, hoisting two U.S.-built communications satellites to orbit for commercial owners in Brazil and Japan.

SpaceX launched a Falcon 9 rocket from Vandenberg Space Force Base, California, with 51 small satellites, hosted payloads, and orbital transfer vehicles heading into polar orbit on the Transporter 7 mission. Liftoff occurred at 11:48 p.m. PDT Friday (2:48 a.m. EDT; 0648 UTC Saturday).