Live coverage: 400th Proton rocket takes off with Russian satellite

A Soyuz-2.1b rocket lifted off at 0541 GMT (1:41 a.m. EDT) Thursday from the Vostochny Cosmodrome in Russia’s Far East, carrying a new Russian weather satellite and 32 secondary payloads into polar orbit.

The launch of a European Ariane 5 rocket was aborted moments after its main engine ignited Tuesday. The dramatic last-second hold was the first time an Ariane rocket launch was aborted after engine start since March 2011. Arianespace has not set a new target launch date for the mission, which will loft two U.S.-built communications satellites for Intelsat and B-SAT.

A Russian Soyuz-2.1b booster is standing at the Complex 31 launch pad at the Baikonur Cosmodrome in Kazakhstan for liftoff with 34 OneWeb broadband satellites early Friday, local time.