SpaceX rocket moon crash is set for Wednesday morning as a four-tonne piece of a Falcon 9 rocket slams into the lunar surface at 5,400mph after drifting in space for more than a year.
The school-bus-size object is the second stage of a Falcon 9 that launched a Firefly Aerospace lunar lander in January 2025.
It is due to hit about 06.35am GMT, striking Einstein crater on the moon’s western limb and leaving behind a new crater about 60ft wide and 12ft deep.
Nasa says the event poses “no danger to Earth” but will kick up a plume of dust that scientists hope to study.
The collision is the latest example of how leftover hardware is becoming a problem in deep space.
Falcon 9 Lunar Impact Creates New Crater
The Falcon 9 lunar impact will happen at 8,690 km/h, fast enough to carve into rock and throw debris outward.
Nasa said the impact should create a crater about 18 metres wide and four metres deep.
Scientists expect the blast to eject dust and rock that may be illuminated by sunlight, though it will be hard to see from Earth.
The rocket body cannot be controlled because it dumped its remaining fuel after launch.
Julianna Scheiman, SpaceX director of Nasa science and Dragon programs, explained: “What has happened is essentially a mixture of solar activity and gravity forces have put it on a path toward the moon.”
Bill Gray, creator of widely used astronomy software who reported on the trajectory in April, noted: “This may be of some – probably minor — scientific interest, and we may learn some things from it.”
He added: “It doesn’t present any danger to anyone, though it does highlight a certain carelessness about how leftover space hardware is disposed of.”
Space Junk Moon Collision Raises Disposal Questions
The incident spotlights the growing issue of space junk moon collision risks as missions to the moon increase.
Rocket stages usually fall back to Earth and burn up or land in the ocean after delivering payloads.
But deep-space missions need extra thrust, so stages can remain in orbit for years.
Thousands of pieces now circle Earth and beyond, forcing active satellites to steer clear.
Nasa’s Jimi Russell said on Tuesday: “The impact poses no danger to Earth and Nasa scientists are planning to collect lunar data from the event and refine techniques for tracking objects in space.”
Nasa intends to image the site before and after the crash to help “better understand artificial impacts and their exploration implications”.
SpaceX and Nasa are now discussing ways to prevent future lunar impacts, Scheiman confirmed.
The goal is to design trajectories that either de-orbit stages safely or send them into graveyard orbits away from the moon.
Einstein Crater Impact Targeted On Western Limb
The Einstein crater impact will occur on the moon’s western edge, an area often difficult to observe from Earth.
That location was chosen by orbital mechanics, not by design.
Einstein crater is large and old, so the new 60ft scar will be a small addition but useful for science.
Researchers want to compare pre- and post-impact images to measure how much material is thrown out.
Such data helps model how future landers, habitats, and equipment might be affected by debris.
It also tests tracking methods for objects that cannot be steered.
“This is essentially a natural experiment,” one Nasa analyst said. “We get to see what happens when human-made objects hit the moon.”
Nasa Lunar Data Collection And Past Impacts
Nasa lunar data collection efforts will focus on dust plumes, seismic signals, and crater morphology.
The agency previously created artificial impacts in 2009 to study lunar water ice.
A Chinese rocket stage also hit the moon in March 2022 after a test mission.
Accidental and failed landings are not new. Russia’s Luna-25 crashed in 2023, India’s Chandrayaan-2 in 2019, and Israel’s Beresheet in 2019.
The Israeli lander even carried tardigrades, microscopic animals known to survive radiation, which may still be on the surface.
Gray said the Falcon 9 crash is different because it was unintentional and involved a large stage.
“ leftover hardware is becoming part of the lunar environment whether we plan it or not,” he warned.
That raises policy questions as governments and companies plan bases near the south pole.
SpaceX Context And Future Prevention
The crash comes as SpaceX reported quarterly results on Tuesday.
The company posted a smaller loss than expected and a surge in revenue in its first report as a public company.
Shares still fell as investors questioned whether it can meet ambitious goals for Starship and lunar missions.
SpaceX has launched dozens of Falcon 9 missions and is building infrastructure for Artemis and private lunar landers.
Preventing more junk will require better mission planning and end-of-life disposal.
Options include targeting stages to impact in safe zones, boosting them into heliocentric orbit, or adding systems to de-orbit them.
Engineers say even small changes in burn timing can avoid future moon strikes.
For now, scientists are treating the event as an opportunity.
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Data from the impact could improve models for planetary defense and for protecting future astronauts.
The moon has no atmosphere, so every impact leaves a permanent mark.
That makes each collision a record of human activity in space.
As lunar traffic grows, agencies agree that rules for cleanup will be needed.
The Falcon 9 stage will be the newest crater by Wednesday morning, a reminder that exploration also leaves footprints.
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