SpaceX’s colossal Starship rocket has blasted off on its most complex test flight yet. The 400-foot rocket soared from the southern tip of Texas on Thursday. Elon Musk hopes to repeat last fall’s dramatic booster capture with giant mechanical arms at the launch pad. This time the company also loaded the upgraded spacecraft with 10 dummy satellites for release. This is the seventh test flight for the world’s biggest and most powerful rocket. NASA has reserved a pair of Starships to land astronauts on the moon later this decade. Musk’s main goal is Mars.