Videos: Previewing SpaceX’s eighth International Space Station resupply launch

Nine Merlin main engines at the base of a SpaceX Falcon 9 rocket fired at launch pad 39A Saturday, passing a major test before the company’s next launch, a secretive mission slated for liftoff Wednesday night.

SpaceX is set to end a two-month launch drought at Cape Canaveral with a blastoff Thursday night carrying a privately-funded Israeli moon lander, an Indonesian communications satellite and a U.S. Air Force surveillance payload into orbit.

Space station flight engineer Jeff Williams will send commands Thursday to pump air into an experimental soft-sided module developed by commercial space habitat builder Bigelow Aerospace, expanding the structure to four times its current size in a stepping stone to future orbital destinations. Live video begins at 5:30 a.m. EDT (0930 GMT).