A piece of a SpaceX Falcon 9 rocket struck the lunar surface at approximately 8,690 kilometers per hour, generating a dust plume that was detected and analyzed by the European Southern Observatory’s Very Large Telescope in Chile. The impact occurred near the moon’s terminator line, the boundary between the sunlit portion and far side of the lunar surface, on Wednesday morning. The rocket component, which measured roughly the size of a five-story building and weighed four tonnes, created a plume spanning several tens of kilometers.
Astronomers observed spectral lines within the impact plume, detecting chemical signatures of sodium and lithium gas that remained visible for five to 10 minutes following the collision. Carl Schmidt from Boston University’s Center for Space Physics determined the plume’s dimensions, while analysis of the spectral data indicated that sodium likely originated from the lunar soil itself, with lithium traces potentially coming from the rocket stage. Despite the detection of these spectral lines, researchers noted that capturing clear visual imagery of the actual impact proved surprisingly challenging, even with multiple telescopes monitoring the moon at the time.
Benjamin Fernando of Los Alamos National Laboratory indicated that the collision could yield valuable scientific insights for future seismic investigations and for assessing potential hazards posed by artificial space debris impacts on the lunar surface. Given NASA’s plans to establish sustained human presence on the moon, understanding the behavior and effects of space debris in lunar orbit has become increasingly important for mission planning and safety considerations.
Experts estimate the collision created a substantial new crater measuring approximately 20 meters in diameter and five meters deep. Both NASA’s Lunar Reconnaissance Orbiter and South Korea’s Pathfinder Lunar Orbiter are anticipated to capture images of the impact site in the coming days, though data transmission may require additional time. The Falcon 9 rocket stage had launched in January 2025 carrying lunar landers, with its upper stage remaining in space after the booster returned to Earth.
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