Live coverage: Two satellites lift off aboard Ariane 5

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.

NASA’s Juno spacecraft barreled toward a Fourth of July rendezvous with Jupiter after a 1.7-billion-mile, five-year trip from planet Earth. The research probe’s main engine ignited for 35 minutes to maneuver Juno into orbit, and engineers received confirmation of the burn’s conclusion on time at 11:53 p.m. EDT Monday (0353 GMT Tuesday).

Six satellites built in France for OneWeb are set for blastoff Wednesday from French Guiana, the first of at least 21 launches using Russian-made Soyuz rockets to haul more than 600 of the refrigerator-sized craft to orbit for global broadband service.