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

A Rockot booster and Breeze upper stage delivered three Russian military communications satellites to orbit Friday after a launch from the Plesetsk Cosmodrome around 500 miles north of Moscow.

Another batch of Starlink Internet satellites shared a ride into orbit with three of Planet’s SkySat Earth-imaging satellites on a SpaceX Falcon 9 rocket Saturday. The Falcon 9 lifted off at 5:21 a.m. EDT (0921 GMT) from pad 40 at Cape Canaveral Air Force Station.

Arianespace’s third Ariane 5 launch of the year was set liftoff Friday from Kourou, French Guiana, but an issue with a sensor on the rocket’s first stage liquid hydrogen tank caused officials to scrub the launch attempt. The Ariane 5 is poised to carry three U.S.-built commercial satellites into orbit, while testing a few rocket upgrades, including a modified fairing needed for the launch of the James Webb Space Telescope next year.