A new-and-improved Starship megarocket is due to soar halfway across the world in a matter of days in SpaceX's first test of the vehicle since May.

Engineers completed a final test of Starship's propulsion system with a so-called "spin prime" test Wednesday at the launch site in South Texas. Ground crews then rolled the ship back to a nearby hangar for engine inspections, touchups to its heat shield, and a handful of other chores to ready it for liftoff.