Live coverage: SpaceX supply ship returns to Earth

These photos show SpaceX’s Falcon 9 rocket, with a previously-flown first stage booster, sitting on its launch pad Tuesday at Vandenberg Air Force Base in California ahead of the scheduled liftoff of the Radarsat Constellation Mission.

The second set of Iridium’s next-generation satellites to launch on a SpaceX Falcon 9 rocket were prepared for liftoff inside a climate-controlled clean room at Vandenberg Air Force Base over the last few weeks.

The launch from Cape Canaveral Space Force Station was the first to the 10th shell of the Starlink constellation. Liftoff from pad 40 happened at 9:56 p.m. EDT (0156 UTC).