Snapshots: Soyuz takes off

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.

If you plan to watch athletes compete on the track or in the water during this year’s Summer Olympics in Rio de Janeiro, there’s a good chance the television signals will be relayed from Brazil using a new Eutelsat communications satellite launched Wednesday aboard an Ariane 5 rocket.

The sixth and final satellite in the U.S. military’s most secure satellite communications fleet lifted off from Cape Canaveral Thursday aboard a United Launch Alliance Atlas 5 rocket, extending the network’s expected lifetime beyond 2030.