The largest, most powerful rocket ever built is about to launch on its sixth test flight. SpaceX's Starship upper stage and Super Heavy booster are stacked next to the launch tower at the company's Starbase launch and test facility in southern Texas ahead of the vehicle's next mission,

SpaceX is scheduled to launch its sixth uncrewed test flight of Starship on Tuesday to expand the massive 400-foot rocket's booster capabilities and bring its "catch and reuse" launch system online.