Nasa's Jumbo Rocket  Ahead of Crucial Test

Arrives at the Launch Pad

NASA’s Space Launch System

is once again standing proud on the launch pad at Kennedy Space Center in Florida.

The gigantic rocket is being

 prepared for its inaugural launch, but the space agency must first succeed at completing a full launch rehearsal

The Moon rocket rolled out

 of the Vehicle Assembly Building earlier today to make the four mile (6.4 kilometer) trek to launch pad 39B.

SLS reached its

 destination some eight hours later, arriving at 8:20 a.m.

The rocket was then

connected to the ground systems in preparation for the tanking test, which is scheduled to happen in about two weeks.

This marks the rocket’s second

 return to the launch pad, as the NASA ground team experienced three failed attempts to complete a full-fledged wet dress rehearsal in April.

Mars Helicopter Marks 

New Flight Records