SpaceX thinks it knows why Starship exploded on its last test flight

SpaceX believes it knows what caused the explosion during the seventh test flight of its Starship spacecraft and Super Heavy booster on January 16th, 2025. Fires in the aft section of Starship, located between the bottom of its liquid oxygen tank and rear heat shield, caused “all but one of Starship’s engines to execute controlled shut down sequences” leading to a loss of communication and eventually the spacecraft’s safety system triggering its own destruction.

The goal of the seventh test flight was to test several upgrades SpaceX made to its heavy-lift rocket system. After a successful launch and completing a full duration burn, the Super Heavy booster separated from Starship and triggered a boostback burn designed to return it to the launch site. Following a landing burn, the Super Heavy booster was successfully caught mid-air by the launch tower at Starbase for the second time.

The mission didn’t go quite as well for Starship. Approximately two minutes after the spacecraft ignited its second stage Raptor engines following separation, a flash was observed in the aft section of Starship …read more