FLORIDA - NASA astronaut Reid Wiseman said on the morning of Jan 17 that a few days earlier, he looked up and saw the crescent moon in the light of the sunrise. He thought about the far side of the Moon – the part that is always hidden from Earth.

With Artemis II, SLS could become the most powerful rocket ever to launch humans. Its four main engines burn roughly 700,000 gallons of ultra-cold fuel, producing enough oomph to keep eight Boeing 747s aloft. Future versions of SLS, if they come to fruition, could deliver even greater power.

Ahead of the historic mission which will return humans around the moon, NASA's giant SLS rocket is set to roll to the KSC launch pad for testing.