A four-ton upper stage of a SpaceX Falcon 9 rocket has slammed into the Moon, confirming what astronomers had been tracking for months. The impact happened near Einstein crater on the lunar western limb at about 2:35 a.m. ET, striking the surface at roughly 5,400 miles per hour.
The collision was not planned by SpaceX or any space agency. It was the accidental end point for a piece of orbital debris that had drifted through space since early last year.
A Discarded Stage From a 2025 Launch
The object that hit the Moon was the second stage of a Falcon 9 rocket that launched a Firefly Aerospace lunar lander mission in January 2025. Once its job was done, the spent stage was left in space rather than guided back to Earth.
For more than a year, the four-metric-ton stage drifted without a controlled path. Solar radiation pressure and gravitational pulls from the Earth and Moon gradually altered its trajectory until it was set on a collision course with the lunar surface.
Impact Near Einstein Crater on the Terminator Line
Tracking data and impact modeling placed the crash site near Einstein crater, close to the boundary between the Moon's near and far sides. The location sits along the lunar terminator, the line separating day from night.
That geometry made the impact difficult to photograph in real time. The New York Times reported that no one captured the moment directly in conventional imagery, though scientists remain confident the crash occurred based on tracking and spectroscopic evidence.
Sodium and Lithium Signatures Detected in the Plume
The European Southern Observatory (ESO) confirmed that its telescope detected spectral lines of sodium and lithium gas in the debris cloud thrown up by the impact. According to ESO, the glow lingered for five to ten minutes before fading.
Scientists cited by PBS NewsHour and ABC said they expected the booster to be completely vaporized on impact, producing a flash of light, a plume of ejecta made of dust and regolith, and a freshly excavated crater on the lunar surface.
Estimating the Size of the New Crater
Researchers cited by The Guardian and other outlets estimate the impact released energy roughly equivalent to three tons of TNT. That would carve out a crater around 27 to 30 meters wide and 4 to 5 meters deep, or about 90 feet by 16 feet.
A crater of that size is too small to spot from Earth-based telescopes but should be visible to orbiting spacecraft equipped with high-resolution cameras.
Only the Second Known Rocket Crash on the Moon
Scientists quoted by major outlets describe this as only the second known case of a discarded rocket accidentally crashing into the Moon. That rarity is part of what makes the event scientifically valuable.
Because the mass, speed, and approximate impact angle of the Falcon 9 stage were well documented in advance, researchers now have a rare known-quantity impact to compare against natural meteoroid strikes on airless bodies like the Moon.
Cislunar Debris Raises New Questions
The crash has renewed attention on space debris beyond Earth orbit. Large rocket stages that drift for years before eventually falling somewhere unplanned highlight gaps in current disposal standards for deep-space missions.
Space-environment advocates and scientists are pointing to this event as a case study for clearer international guidelines on graveyard orbits and end-of-life planning for hardware sent beyond Earth's immediate vicinity.
Tracking specialists, including Bill Gray of Project Pluto, are using data from this impact to refine software that predicts the long-term paths of spent rocket stages and other large debris drifting through cislunar space.
Follow-Up Imaging Expected From Lunar Orbiters
The National Aeronautics and Space Administration (NASA) and other space agencies plan to use lunar orbiters, including the Lunar Reconnaissance Orbiter (LRO), to locate and photograph the new crater. Before-and-after images should help confirm its exact size and shape.
Those comparisons will also help scientists study ejecta distribution and the mechanical properties of lunar regolith at the impact site.
Further details are expected as spectral data on the sodium and lithium emissions undergo additional analysis, and as NASA, ESO, and other research groups release formal findings from the plume observations and eventual crater imagery.
