Video: Soyuz MS-01 leaves the space station for landing

Russian launch crews on two continents are putting the final touches on a pair of Soyuz rockets scheduled to blast off less than two hours apart Friday — one carrying a three-man crew to the space station, and another boosting two European navigation satellites into orbit from the Amazon jungle.

SpaceX test-fired a Falcon 9 rocket at Cape Canaveral Friday evening, igniting nine Merlin engines for several seconds while hold-down restraints kept the launcher on the ground. The company also confirmed the rocket is scheduled for takeoff Wednesday on a space station resupply mission, three days later than previously planned.

The Soyuz MS-07 spacecraft carrying U.S., Russian and Japanese space fliers returned to Earth on Sunday with a parachute-assisted, rocket-cushioned touchdown on the Kazakh steppe after 168 days in orbit.