Live coverage: Proton blasts off on return-to-flight mission

A day after a rare last-minute abort by its Soyuz launcher, a sharp-eyed civilian-operated Russian Earth observation satellite blasted off from the Baikonur Cosmodrome on Sunday on a five-year mission, giving Russia a fleet of three advanced digital imaging spacecraft in orbit.

SpaceX’s launch team in Cape Canaveral fueled a Falcon 9 rocket with super-chilled liquid propellants and briefly fired the first stage’s nine Merlin engines Monday in a customary preflight test ahead of Wednesday’s scheduled liftoff of a commercial television broadcasting satellite for the Asia-Pacific.

SpaceX rolled a fully-assembled Falcon 9 booster out of its hangar and lifted it on top of a launch pad Friday for the first time since an explosion grounded the commercial rocket last year, setting the stage for a one-second launch window Saturday to take off from California’s Central Coast and deploy the first 10 satellites in orbit for a $3 billion upgrade to Iridium’s globe-spanning message relay network.