Success, it turned out, was a complicated thing to celebrate
On the evening of May 22nd, SpaceX launched the twelfth flight of its Starship rocket — a vehicle that aspires to carry humanity back to the Moon — and found itself, as so often in the history of exploration, caught between genuine achievement and humbling limitation. The upper stage completed its arc, satellites were released, and the spacecraft found the ocean as planned; yet beneath these accomplishments, a sequence of engine failures dismantled the Super Heavy booster before it could return to Earth. It is a familiar human story: the summit is glimpsed, the footing gives way, and the climbers must reckon honestly with how much mountain remains.
- A Raptor 3 engine cut out just 102 seconds after liftoff — the newest generation of motors, meant to signal a leap forward, instead revealed unresolved vulnerabilities at the worst possible moment.
- Stage separation scorched the Super Heavy booster's surface, triggering an explosion in its intermediate ring and leaving only five of seven engines able to fire for reentry — far too few to survive the descent.
- Traveling at roughly 1,450 kilometers per hour, the booster disintegrated in the atmosphere and scattered across the ocean 300 kilometers from its intended landing zone, erasing any hope of demonstrating reusability.
- The Starship upper stage lost one of its vacuum engines mid-flight but adapted by extending its sea-level burn — a sign of resilience, but also a sign that adaptation was needed at all.
- A controversial design choice — stripping individual thermal shielding from each engine in favor of internal redesigns — now sits under scrutiny as the likely origin of the cascade of failures.
- Two critical tests, orbital engine reignition and a controlled booster recovery, were scrubbed mid-mission when anomalies mounted, pushing the program's lunar ambitions further down the timeline.
SpaceX launched its twelfth Starship flight on the evening of May 22nd, and by the metrics the company had set for itself, much of it worked. Lifting off with over 8,000 tons of thrust, the upper stage completed its planned trajectory, released Starlink satellites, and splashed down in the Indian Ocean as intended. It was, in SpaceX's own careful phrasing, a partial success.
But the failures were difficult to set aside. Just one minute and forty-two seconds after launch, an engine in the outer ring of the Super Heavy booster shut down without warning — the first sign that the new Raptor 3 motors still harbored unresolved problems. The deeper crisis came at stage separation, when the thermal energy from the Starship's igniting engines scarred the booster below, triggering an explosion in one of its intermediate ring motors and damaging others. When the booster attempted to slow itself for reentry, only five of seven engines responded. It was not enough. The booster broke apart in the atmosphere and fell into the ocean 300 kilometers from its target.
The Starship upper stage lost one of its own engines ahead of schedule but compensated by extending its remaining burn — the mission survived, though the need to improvise told its own story. At the center of the investigation is a design change made before this flight: SpaceX removed the individual thermal shielding that had protected each booster engine in earlier versions, betting that internal redesigns would suffice. The events of May 22nd suggest that bet may not have paid off.
Two objectives that would have marked genuine milestones — an orbital engine reignition and a controlled booster recovery — were abandoned when the anomalies became apparent. What Flight 12 ultimately reveals is a program that has built something impressively capable, but has not yet closed the distance between capability and the reliability that human lunar missions will demand.
SpaceX launched its twelfth Starship flight on the evening of May 22nd, and by most measures it worked. The rocket lifted off at 10:30 p.m. UTC with 8,240 tons of thrust—roughly double what NASA's current SLS booster can produce. The upper stage completed its planned trajectory. Starlink satellites were released as cargo. The spacecraft splashed down in the Indian Ocean as intended. By the metrics SpaceX had set for itself, the mission qualified as a success.
But success, it turned out, was a complicated thing to celebrate. Beneath the accomplishments lay a pattern of failures that exposed how much work remains before this rocket can reliably carry humans to the Moon. The problems began almost immediately. One minute and forty-two seconds after launch, an engine in the outer ring of the Super Heavy booster shut down without warning. The booster's propulsion system is a marvel of engineering complexity—three central engines, eleven in an intermediate ring, nineteen more around the perimeter—and losing one so early was the first indication that something was not entirely under control.
The real trouble came during stage separation. Two and a half minutes into flight, the six engines of the Starship upper stage fired to push away from the booster below. The thermal energy from that burn scarred the Super Heavy's surface. When engineers tried to restart the booster's engines for the return sequence, the system was already compromised. An explosion tore through one of the intermediate ring engines, damaging others nearby. When the booster attempted to slow itself for reentry, only five engines ignited. It was not enough. At roughly 1,450 kilometers per hour, the booster broke apart in the atmosphere, its wreckage scattering across the ocean some 300 kilometers from where SpaceX had calculated it would land.
The Starship itself was not immune to trouble. One of its three vacuum-optimized engines shut down ahead of schedule. The flight control system compensated by extending the burn of the sea-level engines, and the upper stage adapted without losing the mission. But the fact that adaptation was necessary at all underscored a deeper problem: the new Raptor 3 engines, which were supposed to represent a leap forward in reliability, had instead demonstrated that they still harbored unresolved issues.
The root of the problem may lie in a design decision made between this flight and the previous one. In earlier versions of the booster, each engine was wrapped in individual protective shielding to guard against thermal damage and the exposure created by external piping. For this flight, SpaceX removed that protection, relying instead on internal redesigns to keep the engines safe. The events of May 22nd suggest that decision may need to be reconsidered. The company has not yet announced whether it will restore the shielding or pursue a different solution.
SpaceX characterized the flight as a partial success, and that assessment appears honest. Many systems performed as designed. The launch itself was clean. The upper stage reached its target. But the booster's failure to return intact, and the engine problems that caused it, represent a significant setback for a program that needs to demonstrate reliability before it can carry astronauts. The next flights will attempt more ambitious objectives: an orbital engine reignition, which is essential for future maneuvers in space, and a controlled return of the Super Heavy booster. Both tests were planned for this mission but were canceled when the engine anomalies became apparent.
What emerges from Flight 12 is a portrait of a program in motion but not yet in command. SpaceX has built something that mostly works, but the gap between mostly and reliably remains substantial. The path to the Moon, it seems, still has considerable distance to cover.
Notable Quotes
SpaceX characterized the flight as a partial success, and that assessment appears honest.— Analysis of SpaceX's official statement
The Hearth Conversation Another angle on the story
Why does an engine failing ninety seconds after launch matter if the mission succeeds overall?
Because it tells you the system isn't stable. If you lose an engine that early, you need to understand why before you strap people inside.
But the booster's real problem came later, during the return sequence. Why did the separation burn damage the booster so badly?
The Starship's engines fire to push away from the booster. That's extremely hot. The booster's surface wasn't designed to handle that thermal stress, and it was already weakened. Then when the booster tried to restart its own engines, the damage had already been done.
So removing the protective shielding around the engines was a mistake?
Maybe. SpaceX thought they could redesign the internals to be safer. This flight suggests they were wrong, or at least not ready to make that trade-off yet.
What does a partial success actually mean in this context?
It means the spacecraft did what it was supposed to do. The booster didn't. And until the booster can come home intact, you don't have a reusable system—you just have an expensive one-time vehicle.
When will they know if they've fixed these problems?
The next flight. They'll try to reignite engines in orbit and bring the booster back. If that works, they're closer to the Moon. If it doesn't, they're back to the drawing board.