SpaceX's upgraded Super Heavy booster for the upcoming Starship flight has successfully completed cryogenic proof testing, a critical step following the failure of its predecessor. The company announced this milestone on social media, highlighting the completion of a multi-day campaign that tested the newly redesigned propellant systems and the structural integrity of the booster. The 237-foot-tall Super Heavy V3 booster underwent several thermal and pressurization cycles using super-cold liquid nitrogen, simulating conditions it will face during launch. The latest booster, referred to as Booster 19, passed the stress tests after the previous model failed during a pressure test in November, leading to its destruction. SpaceX scrapped that booster after a rupture in the liquid oxygen tank. Now, with successful testing behind them, engineers will install 33 Raptor engines on Booster 19. These engines, designated Raptor 3, are engineered to produce greater thrust and feature design improvements for enhanced reliability. The updated configuration includes integrated plumbing and sensors, which simplifies the rocket’s structure by removing the need for separate heat shields between the engines. This progression is significant for SpaceX as they prepare for the first test flight of Starship V3, or Block 3. The previous version, Starship V2, had a mixed track record with three of its first five test flights failing. The advancements in the design and testing of the Super Heavy booster suggest a more reliable approach moving forward, as the company aims to achieve its ambitious goals in space exploration.