SpaceX's Starship Launch Delayed Multiple Times.

The launch of SpaceX's Starship, the most powerful rocket ever built, has been postponed for at least 48 hours due to a frozen "pressurant valve". The rocket, designed to be fully and rapidly reusable, is almost twice as powerful as any other rocket and is intended to usher in an era of interplanetary travel for ordinary humans. If the launch goes ahead this week, the rocket will aim for 90% thrust, meaning the stage should deliver something close to 70 meganewtons. SpaceX is aiming for both the booster and the ship to be making controlled landings so they can be refuelled and relaunched.