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

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).

A new European satellite carrying instruments to track changes in the world’s oceans, measure receding ice sheets and chart vegetation growth climbed into orbit Wednesday on top of a Russian Rockot launcher.

The Russian government is investigating flaws found in Proton rocket engines, ordering all suspect components to be replaced before the heavy-lift booster can resume launches and promising penalties for those responsible for allowing substandard parts to slip through inspection.