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.

NASA is preparing to roll out its towering Artemis 2 moon rocket to Launch Pad 39B at the Kennedy Space Center on Jan. 17, and we will have full coverage of the major event here.