NASA is counting down toward a Saturday launch of its new moon rocket, its second attempt in a week.

NASA will try again Saturday to launch its new moon rocket on a test flight.

With this critical test finally finished, NASA now will send the rocket segment to Kennedy Space Center for launch preparations. (NASA via AP)CAPE CANAVERAL, Fla. – NASA completed an engine test firing of its moon rocket Thursday, after the first attempt in January ended prematurely. This time, the four main engines of the rocket’s core stage remained ignited for the full eight minutes. John Honeycutt, NASA's program manager for the Space Launch System or SLS rocket, said everything seemed to go well in Thursday's test firing. The SLS rocket will send an empty Orion capsule to the moon and back.