Video: 4K video replay of SpaceX’s CRS-21 launch (members only)

A Russian military communications satellite launched Friday from the Baikonur Cosmodrome in Kazakhstan, riding a Proton rocket and Breeze M upper stage into orbit on just the second Proton flight this year, the lowest annual flight rate for Russia’s most powerful operational launcher since the 1960s.

A week after scrubbing a launch attempt to evaluate an issue with an oxygen sensor, Rocket Lab launched a mission Wednesday to deliver 10 small commercial Earth observation satellites to orbit. Liftoff of the Electron booster from Rocket Lab’s spaceport in New Zealand occurred at 5:21 p.m. EDT (2121 GMT).

Forecasters predict a 60 percent chance of favorable weather for launch of a SpaceX Falcon 9 rocket Thursday from NASA’s Kennedy Space Center in Florida to carry more Starlink broadband satellites into orbit.