Standing tall at its fully assembled height of 327 feet, the Ares I-X is one of the largest rockets ever processed in the Vehicle Assembly Building's High Bay 3, Super Stack 5 at the Kennedy Space Center.

Ares I-X rivals the height of the Apollo Program's 364-foot-tall Saturn V. Five super stacks make up the rocket's upper stage that is integrated with the four-segment solid rocket booster first stage. Ares I-X is the test vehicle for the Ares I, which is part of the Constellation Program to return humans to the moon and beyond.

The Ares I-X flight test currently is targeted for Oct. 31.