Watch the Falcon 9 launch from pad 39A

SpaceX’s Dragon supply ship executed a laser-guided rendezvous with the International Space Station early Sunday, delivering an experimental expandable enclosure for attachment to the complex later this month for tests to verify the inflatable design’s suitability for future space habitats.

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.

In the week since it departed the International Space Station to wrap up a successful cargo delivery mission, Orbital ATK’s Cygnus supply ship hosted a combustion research experiment, deployed four small satellites for a San Francisco-based startup, then descended into Earth’s atmosphere Sunday for a destructive re-entry.