Photos: News media images of Atlas 5 launch

The core piece of NASA’s first huge Space Launch System heavy-lift rocket designed to carry astronauts back to the moon fired its main engines more than eight minutes Thursday in southern Mississippi, acing a crucial test before the it ships to the Kennedy Space Center in Florida to prepare for liftoff.

SpaceX’s Falcon 9 rocket will go from Cape Canaveral to low Earth orbit in less than 10 minutes Friday night with a Dragon capsule heading for the International Space Station carrying more than 4,300 pounds of supplies and experiments.

A critical test firing Saturday of the four main engines powering the first stage of NASA’s gargantuan Space Launch System moon rocket is the final major hurdle before the fully assembled booster’s costly, oft-delayed launch late this year on an unpiloted test flight.