The unmanned Starship, the largest rocket system ever built, was set to lift off from the SpaceX port in Texas on Sunday for a fifth test flight. The 30-minute launch window was set to open at 7 am (1200 GMT), after the US Federal Aviation Authority gave its approval on Saturday. The Starship – consisting of the approximately 70-metre-long Super Heavy booster and the approximately 50-metre-long upper stage, also called Starship – was designed to enable manned missions to the moon and Mars. The system has been developed in such a way for the spaceship and rocket to be reused after returning to …