A piece of metal about the size of a school bus drifting through space for eighteen months without being stopped before slamming into the moon at 5,400 miles per hour is a very unsettling thought. Not because it’s dangerous—scientists are sure it isn’t, at least not right now—but because it makes us think about how we handle the things we leave behind.
The thing in question is the upper stage of a SpaceX Falcon 9 rocket. This is the part that doesn’t land back on Earth like the more famous booster does. It sent two US and Japanese lunar landers into space in January 2025 and pushed them toward the moon with more force than a normal mission close to Earth would need. That extra energy is exactly what made things go wrong. Once it was done, the second stage was in an orbit that was too high for it to fall back into Earth’s atmosphere and burn up. So it stayed. Not stable. Being pushed slowly by both gravity and sunlight.
Astronomers didn’t figure out where it was going until earlier this year. Julianna Scheiman, who is in charge of NASA science and Dragon programs at SpaceX, put it very simply: the stage was heading straight for the moon because of solar activity and gravity. The impact, which was planned for 2:35 AM Eastern time, was aimed at Einstein Crater on the western limb of the moon, an area that Earth can’t see all the way through. The rocket body hit at a speed of about 8,700 kilometers per hour and weighed about four metric tons. The crater it made would be brand new.
There were no spacecraft in orbit around the moon that could record the event live. Scientists had to look at pictures from telescopes in the Americas for hours before they could confirm what everyone already thought. The impact likely lit up the plume of lunar dust it sent up, but it was too far away for Earth’s people to see with the naked eye. It’s possible that the crash site will hold some small scientific value, like seismic data or information about the makeup of the dust. But no one is calling this a discovery. Bill Gray, who made popular astronomy software and followed the stage’s path for months, said it might be somewhat interesting to scientists. It does, however, “highlight a certain carelessness about how leftover space hardware is thrown away.”” Take a moment to think about that word: careless.
Something made by people has hit the moon before without being asked to. It was in March 2022 that a Chinese rocket stage hit the moon’s surface. As planned, Russia’s Luna-25 mission went off course and crashed in 2023. In 2019, both the Chandrayaan-2 lander from India and the Beresheet lander from Israel crashed. It turns out that the moon has a quiet record of failed human missions along with its famous landings.
The setting of this event is what makes it feel different. As part of its Artemis program, NASA is working hard to build a base on the moon. Before the end of this decade, crewed missions to the moon’s surface are expected. It’s no longer just a thought that rocket stages falling near that infrastructure, near astronauts and scientific equipment, without being controlled. Professor Hugh Lewis of the University of Birmingham made it clear: if the moon becomes a real place to visit, then incidents like these could eventually put people and buildings in real danger. The goals have grown faster than the regulatory frameworks have been able to keep up.
Reports say that NASA and SpaceX are talking about how to stop this kind of thing from happening again. That talk is long overdue. Rocket upper stages need to be thrown away in a responsible way. This is an engineering problem that can be solved. It’s not as clear if the commercial space industry will make it a priority before or after something goes badly wrong.
Einstein Crater has a new scar for now. A Falcon 9 second stage has also been added to the slow-motion record of space exploration history. This is not as a triumph, but as a reminder of what can happen when the plan ends at launch and there is nothing else to do.
