Essex Files: Starship Soars, Then Stumbles - SpaceX’s 9th Test Flight Failed, Yet Yields Valuable Lessons

Red Huber/Orlando Sentinel via AP

On May 27, 2025, SpaceX conducted its ninth test flight of the Starship rocket from its Starbase facility in Texas, marking another step in its ambitious journey to create a fully reusable rocket system for interplanetary travel. Launched at 7:37 p.m. EDT, the mission showcased the first reuse of a Super Heavy booster but ended with both the Starship spacecraft and the booster failing to achieve their planned objectives, providing valuable lessons for future flights.

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The Starship, consisting of the Super Heavy Booster 14-2 and the upper stage Ship 35, lifted off successfully, captivating viewers via a live stream on SpaceX’s website. This flight was historic as it featured the first reflight of a Super Heavy booster, a milestone in SpaceX’s goal to make the booster capable of multiple launches per day. The rocket executed a smooth ascent, with the booster separating cleanly and beginning its boostback maneuver toward a planned splashdown in the Gulf of America. Ship 35 reached a suborbital altitude of approximately 189 kilometers, carrying a payload of eight Starlink mass simulators.

The mission encountered significant issues during the coast phase. A propellant leak in Ship 35 caused it to lose attitude control, resulting in an uncontrolled spin. This prevented the deployment of the satellite simulators and disrupted experiments to test new heat shield tile configurations, critical for protecting the spacecraft during reentry. As a result, Ship 35 could not orient itself properly and disintegrated during reentry over the Indian Ocean, with debris falling safely away from populated areas.

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Meanwhile, the Super Heavy booster faced its own difficulties. During its landing burn, a catastrophic failure occurred, and the booster was destroyed before it could splash down in the Gulf of America. SpaceX had intentionally pushed the booster’s limits to gather data, but the failure underscored ongoing challenges in achieving controlled landings for reusable boosters.

Despite the setbacks, SpaceX emphasized the value of the data collected. “Success comes from what we learn,” the company posted on X, highlighting that the test was designed to stress the vehicle and provide insights into its performance under extreme conditions. The flight lasted over an hour, a significant improvement over the previous two tests in January and March 2025, which ended in explosions minutes after launch. SpaceX plans to analyze telemetry and live footage to refine the Starship’s design, particularly focusing on reentry dynamics and booster reliability.

Elon Musk, in a pre-launch discussion, stressed the importance of testing heat shield tiles, describing reentry as the mission’s critical focus. Although the spinning spacecraft limited these tests, the data gathered will inform future iterations, bringing SpaceX closer to a reliable, reusable rocket system.

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This test follows a pattern of iterative development, with previous flights revealing issues like propellant leaks and vibrations that SpaceX has worked to address. The company’s persistence reflects its long-term vision of enabling human missions to the Moon and Mars. Future flights will likely attempt to catch the booster with the launch tower’s “chopsticks” and further refine reentry techniques.

SpaceX’s ninth Starship test flight, while not achieving all objectives, provided critical insights that will shape the path toward making life multiplanetary. As the company prepares for its next launch, the lessons from this mission will drive improvements, inching closer to a future where space travel is routine and accessible.

Editor's Note: This post was updated to reflect that the splashdown occurred in the Gulf of America. (Sorry, folks, it's early and old habits die hard!)

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