An upper stage from a SpaceX Falcon 9 rocket launched in January 2025 is on a collision course to impact the Moon on Wednesday, August 5. Traveling at roughly 8,700 km/h, the abandoned booster will strike near the Einstein crater on the lunar near side, creating a new crater and a visible dust plume.
More than a year after serving as the propulsion unit for a dual lunar mission, a piece of orbital hardware is about to crash onto the lunar surface. The 12-meter-long, 4.5-tonne piece of space hardware was used on January 15, 2025, to propel two separate lunar landers toward the Moon. One of those craft, the Blue Ghost lander developed by Firefly Aerospace, became the first private device to succeed in a complete lunar landing, while a second lander designed by ispace crashed during its attempt.
Following its mission deployment, the Falcon 9 upper stage drifted into an eccentric loop. Independent astronomer Bill Gray, the creator of the Project Pluto software designed to track near-Earth objects and man-made space hardware, first calculated and announced the impending trajectory months ago.
Impact Physics Near the Einstein Crater at 8,700 Kilometers Per Hour
The rocket stage will strike the Moon at a velocity of 8,700 km/h—roughly seven times the speed of sound. Calculations indicate the impact will occur near the Einstein crater on the visible face of the Moon.
Experts estimate the kinetic energy released during the crash will be equivalent to roughly three tonnes of TNT. This impact is projected to carve out a fresh crater measuring approximately 27 meters in diameter and five meters in depth.
Bill Gray, independent astronomer, via Midi Libre, stated that they might see the flash, they might see rocks ejected from the crater, or they might even see both.
Bill Gray, independent astronomer, via Midi Libre
While the flash of light generated by the impact will likely prove too faint for direct viewing from Earth, the resulting debris cloud offers a distinct observational window. USA Today notes that the collision will kick up enough dust to be visible from Earth, more than 400,000 kilometers away for observers equipped with proper telescopes.
Scientific Calibration Opportunities for Los Alamos Researchers
Far from being treated as a mere orbital mishap, the incoming collision has galvanized planetary scientists. Benjamin Fernando of the Los Alamos National Laboratory in New Mexico pointed out that natural meteoroids strike the lunar surface frequently, but researchers routinely struggle to pinpoint their precise mass and impact velocity.
Because researchers know the exact dimensions, weight, and velocity of the descending SpaceX booster, the event serves as a controlled test. Scientists plan to analyze the ejected material plume to gather hard data concerning lunar composition. Benjamin Fernando explained regarding the analysis of the displaced regolith that if they manage to measure it, that will inform them about the composition of this part of the Moon explained Benjamin Fernando regarding the analysis of the displaced regolith.
Orbital assets are primed to document the transformation. Both NASA’s Lunar Reconnaissance Orbiter (LRO) and South Korea’s Danuri probe are scheduled to capture detailed imagery of the target site both before and after the collision occurs.
Precedent, Safety Assurances, and Future Orbital Debris Monitoring
The upcoming impact marks only the second known accidental collision of a human-made rocket part with the Moon. The first recorded incident involved a stray piece of a Chinese rocket in 2022, which left two craters on the lunar far side.
Astronomers emphasize that the public faces zero risk from the event. Bill Gray explicitly confirmed that the collision presents no danger to anyone on Earth and will cause no significant damage to the Moon’s surface.
Yet, experts warn that the incident highlights mounting vulnerabilities in deep space traffic management. As national space programs led by the United States and China accelerate alongside a booming commercial sector, abandoned hardware is becoming more common.
Astrophysicist Jonathan McDowell noted that while the current crash is benign, similar uncontrolled trajectories will demand stricter tracking protocols as space agencies move toward establishing permanent bases on the lunar surface and protecting future astronaut crews from unpredictable space debris hazards.
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