A discarded SpaceX Falcon 9 upper-stage rocket has crashed into the Moon after drifting through space for more than 18 months, marking one of the few known accidental impacts of human-made space debris on the lunar surface. The 4,000-kilogram rocket stage, originally launched in January 2025 to deploy Firefly Aerospace’s Blue Ghost and ispace’s Resilience lunar landers, struck the Moon at an estimated speed of 8,690 km/h (5,400 mph). Scientists believe the impact created a crater measuring roughly 20 to 40 metres across, although confirmation is expected only after orbital imagery becomes available.
How the Falcon 9 Ended Up on a Collision Course
Unlike the reusable first stage of the Falcon 9 rocket, the upper stage is designed for a single mission. After successfully sending the two lunar landers toward the Moon, the stage exhausted its fuel and could not perform a controlled disposal manoeuvre. Instead of returning to Earth or entering a stable solar orbit, it remained in a high-Earth orbit that crossed the Moon’s path. Over time, a combination of solar radiation pressure and gravitational forces from the Earth and Moon gradually altered its trajectory, ultimately sending it toward the lunar surface. SpaceX has said the disposal method complied with existing safety regulations for high-energy missions but acknowledged that future disposal strategies are being evaluated with NASA and other agencies.
Scientists See a Rare Research Opportunity
Though the outcome was unexpected, researchers see a great chance for learning about the Moon’s surface and planning future space missions. The collision is believed to have produced a plume of dust and rock particles, which will help scientists study physical processes, crater formation, and the interaction between man-made objects and the lunar surface. As the collision took place on the illuminated part of the Moon near the Einstein Crater area, observing the event from Earth was not easy. However, satellites such as NASA’s Lunar Reconnaissance Orbiter and South Korea’s Danuri should capture images before and after the event to detect the created crater.
Growing Focus on Space Debris
This incident has triggered a debate on how to handle space debris in view of the growing number of lunar expeditions. Beyond rocket stages that have impacted the Moon in the past—including one in 2022 and NASA experiments during the Apollo missions—the increasing number of commercial and governmental lunar missions poses new challenges for orbital sustainability. Space organizations and private firms are already seeking better ways to manage space debris from high-energy missions to ensure no abandoned spacecraft becomes a hazard. The Falcon 9 crash serves as a reminder that mission planning must account for deep-space travel’s unique challenges.