Jeremy Kariuki and Thom Patterson

Is it NASA’s Space Launch System, or SpaceX’s Starship? The answer depends on more than just total thrust.

Finally, after more than a decade of planning, designing, building, and testing, NASA’s Artemis I rocket, dubbed Space Launch System (SLS), began rolling out of its gigantic Vehicle Assembly Building (VAB) Thursday at Florida’s Kennedy Space Center. Destination: Launch Pad Complex 39B.