SpaceX's anticipated test launch of its upgraded Starship megarocket was postponed just minutes before liftoff due to a hydraulic issue. Elon Musk revealed that the hydraulic pin holding the tower arm did not retract, leading to the decision to delay the launch. The company is now targeting a new attempt for 5:30 PM local time on Friday. This launch is particularly significant as it comes shortly after SpaceX filed paperwork for a potential IPO, expected to be one of the largest in history. The upcoming mission will mark Starship's 12th test flight and the first in seven months, with the rocket standing over 124 meters tall. The primary objective is to test various upgrades and redesigns, including deploying 20 mock satellites and two modified Starlink satellites equipped with cameras. The mission's success is crucial, not only for SpaceX's ambitions but also for NASA's plans to return astronauts to the Moon by 2028 under the Artemis programme. Experts emphasize the importance of this test, highlighting the engineering challenges that remain, particularly regarding Starship's ability to refuel in orbit, which is essential for deep-space missions.