Photos: Liftoff of Atlas 5 from California

The last planned batch of high-resolution SkySat commercial Earth-viewing reconnaissance satellites owned by Planet will accompany 58 Starlink broadband relay stations on a climb into orbit Tuesday from Cape Canaveral on top of a SpaceX Falcon 9 rocket, adding to the world’s two largest commercial satellite fleets.

An electrical problem on one of the Ariane 5 rocket’s two solid rocket boosters led to an on-pad launch abort Tuesday, likely delaying liftoff with two U.S.-built communications satellites until around the end of September, Arianespace officials said.

Maintaining a brisk flight rate three days after its last launch, SpaceX sent a Falcon 9 booster powered by a reused first stage into orbit Wednesday evening from Florida with an Airbus-built communications satellite for SES and EchoStar.