As SpaceX gears up for the ninth test flight of its super-heavy Starship launch vehicle, the company has released findings from its investigation into the explosion of the rocket's upper stage, referred to as "ship", during its eighth test flight in March.

Federal regulators gave SpaceX the green light for another test flight of Starship, the most powerful launch vehicle ever constructed, after mishaps earlier this year rained debris near populated islands.

SpaceX's gargantuan Starship rocket is due to once again get off the ground from Texas more than two months since its last launch.