Category: solar system

The final resting place of SpaceX's moon-smashing rocket has been found.

The Korea Pathfinder Lunar Orbiter, known as Danuri, has captured imagery of the crater blasted out by the Falcon 9 upper stage that slammed into the moon early on Wednesday morning (Aug. 5).

"Danuri began observations about 30 minutes before the collision and, through orbit control, passed over the impact site multiple times, conducting a total of 8 imaging sessions," officials with the Korea Aerospace Research Institute (KARI) said via X this morning (Aug. 6). "Through this observation, changes in the terrain around the impact site and traces of ejecta spread were confirmed."

"Danuri secured both pre-collision and immediate post-collision footage, enabling analysis of changes caused solely by the collision and providing important research data," they added in the X post, which shared several before-and-after images of the impact site.

The Falcon 9 in question launched on Jan. 15, 2025, sending two private robotic moon landers — Firefly Aerospace's Blue Ghost and ispace's Resilience — to a high, moon-crossing Earth orbit. The duo then made their own way to the moon; Blue Ghost landed successfully on March 2 of that year, but Resilience crashed during its touchdown attempt.

The Falcon 9's first stage came back to Earth shortly after liftoff for recovery and reuse, as such boosters commonly do. Falcon 9 upper stages, by contrast, are expendable. SpaceX usually disposes of them in Earth's atmosphere, but the upper stage on the Blue Ghost-Resilience mission used almost all of its fuel getting its payloads to their distant destination. So the 8,800-pound (4,000 kilograms) rocket body remained up there, orbiting Earth — until solar activity and gravitational forces pushed it on a collision course for the moon.

That collision occurred at 2:34 a.m. EDT (0634 GMT) on Wednesday, according to KARI officials — right in line with predictions. Scientists calculated some other parameters ahead of time as well. For example, the rocket body probably hit the moon at about 5,400 mph (8,690 kph), gouging out a crater up to 89 feet (27 meters) wide.

The new observations by Danuri, as well as future work by other lunar probes, will help verify such predictions.

"The observation data secured by Danuri will be linked with follow-up observations from NASA's Lunar Reconnaissance Orbiter (LRO) and utilized in international collaborative research," KARI officials said in the X post.

It may be that some ground-based telescopes caught the impact as well. Astronomers at the Instituto de Astrofísica de Andalucía in Spain believe they captured a video of ejected material blasting off of the lunar surface around the predicted time of impact:

The Falcon 9 upper stage wasn't the first rocket body to slam into the moon. The third stage of a Chinese Long March 3C crashed into the lunar surface on March 4, 2022, for example. And the third stage of NASA's Saturn V rocket gouged out craters during multiple Apollo moon missions.

Danuri is South Korea's first lunar probe. The spacecraft launched on Aug. 4, 2022 atop a Falcon 9 and began circling the moon four months later. It carries six payloads, five of them provided by Korean universities and research organizations. The sixth is a NASA instrument called ShadowCam, which hunts for signs of water ice in permanently shadowed regions at the lunar poles.

A spent rocket body hitting the moon made headlines this week, but the reality is that the unplanned collision by a SpaceX upper stage was just the latest in a long history of human-made objects meeting their end by impacting the lunar surface.

Astronomers around the world kept their telescopes trained on the moon early Wednesday morning (Aug. 5), when the rocket stage from a January 2025 U.S. commercial lunar landing mission was calculated to strike the celestial body. Though the fate of the SpaceX Falcon 9 part was unintentional — solar activity and gravitational forces caused the stage to slam into the moon — the impact offered a rare opportunity to try to observe the flash from the impact and the plume of lunar material it sent flying.

By noon (EDT) on Wednesday, there were no confirmed reports of the impact being caught on film, but a telescope in Chile spotted the debris plume, according to the Associated Press.

"This rare occurrence has decades of history, going back to the Apollo era," wrote Jared Isaacman, NASA's administrator, in a post to his social media accounts. "The reality is that meteoroids strike the lunar surface hourly, with impacts comparable to this upper stage occurring roughly every six days."

Inventorying the impacts

The moon is peppered with the scattered metal remains of missions that missed their mark, came down too quickly or were purposefully sent careening into the regolith to learn more about the makeup of Earth's natural satellite.

In fact, the very first mission to successfully fly by the moon was intended to be an impactor. The former Soviet Union's Luna 1 probe was designed to hit the moon but instead zoomed past its target and entered orbit around the sun on Jan. 2, 1959.

Luna 2, launched nine months later, became humanity's first object to reach the lunar surface, purposefully slamming into Sinus Lunicus ("Bay of Lunik"), along the southeastern edge of Mare Imbrium, on Sept. 14, 1959.

The U.S. followed suit, though not as NASA intended, with the Ranger 4 probe impacting the far side of the moon on April 26, 1962. The mission had included an impactor, but both it and its lander failed to operate due to a failure to deploy the spacecraft's solar arrays.

Once humans began arriving on the moon with NASA's Apollo program, scientists found another reason to direct spent rocket and spacecraft stages into a collision course with the surface. Beginning with Apollo 11 in 1969 and concluding with Apollo 16 in 1972, seismometers were placed on the moon to measure natural "moonquakes" and the effects on the moon when the missions' Saturn SIV-B stages and Apollo lunar module descent stages made hard landings.

The data collected helped geologists learn more about the interior makeup of the moon, including that a rocky mantle exists under the outer crust.

After Apollo, planned impacts (and missions) slowed down, if not outright stopped, but the SpaceX collision on Wednesday was not the first in more than 50 years. Between 1993 and today, 11 probes — four from China, three from Japan, two from the U.S. and one each from India and the European Space Agency (ESA) — were intentionally deorbited at the end of the end of their missions around the moon.

Some of these impacts were performed to discard the craft, but others — like Lunar Prospector, LCROSS and Chandrayaan-1 — helped confirm the presence of water by examining the resulting plume.

Unintentional collisions are fewer in number, as are rocket stages, but are not unprecedented. A rocket body that hit the moon's far side in March 2022, leaving behind a small double crater, was later identified as a Long March 3C rocket that launched China's Chang'e 5-T1 mission around the moon in 2014.

Litter versus liability

Without a large human population on the moon, the risk that these planned and unplanned impacts present at current is minimal. But the concern rises as NASA and other world space agencies, as well as commercial interests, begin to increase the pace on establishing their now-planned sustainable facilities for astronauts to live and work on the lunar surface.

"The future lunar base will incorporate reusable spacecraft that not only deliver astronauts and payloads, but also become part of the infrastructure itself," Isaacman said in his post, referring to how reuse can be a way to reduce the number of vehicles needed to be discarded of on the moon.

The Artemis Accords, an internationally agreed-upon set of standards led by NASA and currently signed onto by 70 countries, also includes a provision for its members that spacecraft and their associated rocket components must be disposed of safely.

Early this morning, a SpaceX rocket slammed into the moon at seven times the speed of sound. Now, lunar orbiters are trying to get a look at the aftermath.

This morning (Aug. 5) at about 2:35 a.m. EDT (0635 GMT), the upper stage of a SpaceX Falcon 9 rocket crashed into the moon. To dissect what exactly happened, scientists are looking for imagery of the crash site, with the help of a couple of moon probes.

"NASA’s Lunar Reconnaissance Orbiter and NASA’s ShadowCam instrument on the Korea Pathfinder Lunar Orbiter will look for opportunities to capture before‑and‑after imagery of the impact site," NASA spokesperson Rob Garner, of NASA's Goddard Space Flight Center in Maryland, told Space.com. "Image availability depends on several factors, including the impact location, lighting conditions, and when each spacecraft’s orbit next carries it over the area, which may take a few days to receive any imagery."

While you've likely seen the first stages of Falcon 9 rockets gracefully land back on Earth for reuse, the rocket's 9,000-pound (4,000 kilograms) upper stage is disposable. Typically, it's sent to burn up in our atmosphere after its missions are over.

However, that wasn't possible with this rocket, which launched two private lunar landers — Firefly Aerospace's Blue Ghost and Tokyo-based ispace's Resilience — to a high, moon-crossing Earth orbit in January 2025. The Falcon 9 upper stage used most of its fuel getting to this distant location and couldn't make it back to deorbit in Earth's atmosphere.

So the company performed a different maneuver to take care of this upper stage, Julianna Scheiman, director of NASA science and Dragon programs at SpaceX, said during a press conference on Aug. 3.

"For high-energy missions, we need to perform a different maneuver to ensure the second stage itself is safe per the appropriate rules and regulations, and so we did that here," she said.

But the rocket body was still subject to natural forces, which acted on it over time.

"What has happened is, essentially, a mixture of solar activity and gravity forces have put it on a path towards the moon," Scheiman said.

The Falcon 9 upper stage ended up slamming into the moon this morning at about 5,400 mph (8,690 kph). It likely blasted out a crater up to 89 feet (27 meters) wide, according to scientists' calculations.

This was certainly not the original intended outcome for this rocket. But it presents an opportunity for researchers, who plan to take advantage of it to learn more about the moon.

"NASA’s Meteoroid Environments Office will attempt to image the impact around the predicted time using ground‑based telescopes at the agency's Marshall Space Flight Center in Huntsville [Alabama]," Garner added. "Because the impact flash and plume are expected to be faint, the chance of seeing anything from Earth remains low, and local weather can affect observations as well. Any data collected will help scientists better understand impacts from artificial objects and the potential effects on future lunar exploration."

Today's impact took place on the sunlit side of the moon, the brightness of which made observations difficult for skywatchers hoping to watch the crash from afar with telescopes. But the two lunar orbiters might be able to see not just the crash and impact crater but also the plume of dust kicked up by the rocket's death dive.

So far, observations from Earth have revealed some information. Scientists at the Lowell Observatory in Flagstaff, Arizona reported detections of a lunar plume from the impact.

"We can safely say that we measured a response from the rocket stage impact as a sodium and lithium gas plume a few 10’s of kilometers in size lasting between 5 and 10 minutes after impact," Carl Schmidt told Inside Outer Space's Leonard David.

Such images of the event would provide "an opportunity to test pipelines for measuring flash properties to locate impact events seismically, and to better understand the multi-modal hazards posed to future lunar infrastructure and astronauts from space debris impacting the moon," researchers led by Benjamin Fernando of Los Alamos National Laboratory in New Mexico wrote in a recent paper discussing the then-upcoming event.

So hold tight, as researchers are now eagerly collecting and analyzing the images captured by these orbiters, and we might get images of the rocket crash, the lunar plumes and remaining aftermath soon.

A discarded SpaceX Falcon 9 upper stage is on a collision course with the moon, and skywatchers may be wondering whether they'll be able to witness the rare event firsthand when it slams into the lunar surface early Wednesday morning (Aug. 5).

The 45-foot-long (13.8-meter), 8,000-pound (4,000-kilogram) rocket stage, left over from the January 2025 launch of Firefly Aerospace's Blue Ghost and ispace's Hakuto-R lunar missions, is expected to strike the moon at about 2:35 a.m. EDT (0635 UTC) on Aug. 5. Traveling at roughly 5,400 mph (8,700 km/h), the impact will occur near the moon's western limb, close to Einstein Crater on the moon's Earth-facing side.

While the collision itself is unlikely to be visible from Earth, observers may have a chance to spot what's known as an ejecta plume rising above the lunar surface. Depending on the force of the impact, debris could be blasted high enough above the moon to stand out against the blackness of space, making it briefly visible to observers on Earth, according to Project Pluto. "Maybe we'll see the flash. Maybe we'll see rocks ejected from the crater. Maybe we'll even see both," astronomer Bill Gray, who first identified the rocket stage's eventual lunar collision, wrote on his Project Pluto website.

The rocket is expected to strike a sunlit portion of the moon near its edge as seen from Earth. Any flash from the impact itself is expected to be washed out by the bright lunar surface.

However, material blasted high above the lunar horizon could briefly become visible against the darkness of space, creating a faint plume that advanced amateur astronomers may be able to capture with sufficiently large telescopes and cameras. Recent simulations suggest the central ejecta plume could climb as high as 60 miles (100 kilometers), though whether it will be detectable from Earth remains uncertain.

Even if conditions cooperate, viewing won't be ideal for much of North America. At the time of impact, the moon will sit only about 40 degrees above the southeastern horizon for observers along the U.S. East Coast, giving skywatchers a relatively low viewing angle before dawn. Observers in parts of South America may have more favorable viewing conditions, with the moon higher in the sky during the event, according to Project Pluto.

Regardless of whether the impact can be seen from Earth, several spacecraft will be watching from much closer vantage points.

South Korea's Danuri lunar orbiter is expected to observe the impact in real time, offering a unique view from lunar orbit. Meanwhile, NASA's Lunar Reconnaissance Orbiter (LRO) will photograph the impact site before and after the collision, allowing researchers to measure the newly formed crater and compare it with other human-made impacts on the moon.

Whether or not the ejecta plume is spotted from Earth, researchers say the accidental crash represents a valuable scientific opportunity. Unlike natural meteoroids, the hollow aluminum rocket stage will strike the moon with well-known size, mass and velocity, giving scientists a rare chance to test models of how impacts excavate lunar material and create craters.

The observations could also help researchers better understand the hazards posed by space debris as both crewed and robotic missions to the moon become increasingly common, if all goes according to plan.

This rocket wasn't supposed to die so dramatically.

On Wednesday (Aug. 5) at about 2:35 a.m. EDT (0635 GMT), the upper stage of a SpaceX Falcon 9 rocket will slam into the moon, blasting out a crater about 89 feet (27 meters) wide.

The rocket body has been loitering lazily high above Earth for more than 18 months. What jolted it out of its unremarkable senescence and put it on a kamikaze course for the moon?

It didn't take much, as the rocket regularly crossed into the moon's neck of the woods.

The Falcon 9 launched in January 2025, carrying aloft two private robotic lunar landers — Firefly Aerospace's Blue Ghost and Resilience, which was built by the Tokyo-based company ispace. (Blue Ghost landed successfully and carried out its historic mission, but Resilience crashed during its touchdown attempt.)

Falcon 9 first stages are famously reusable, but the vehicle's upper stages fly just once. SpaceX usually deorbits these rocket bodies shortly after launch, guiding them back for controlled destruction in Earth's atmosphere. That wasn't possible on the Blue Ghost-Resilience launch, however, as getting the lunar probes to their distant deployment point used up almost all of the upper stage's fuel.

As a result, the 8,800-pound (4,000 kilograms) rocket body "was abandoned in a moon-crossing high-Earth orbit," according to a recent study about the coming impact led by Benjamin Fernando of Los Alamos National Laboratory in New Mexico.

SpaceX performed "a different maneuver [than deorbiting] to ensure that the second stage itself is safe per the appropriate rules and regulations," Julianna Scheiman, director of NASA science and Dragon programs at SpaceX, said today (Aug. 3) during a press conference discussing the company's Crew-13 astronaut launch to the International Space Station, which is targeted for Sept. 12.

That maneuver did not lock the hunk of space junk into a stable location, however; natural forces still acted upon it and, it turns out, changed its trajectory.

"What has happened is, essentially, a mixture of solar activity and gravity forces have put it on a path towards the moon," Scheiman said.

Astronomers and lunar scientists are looking forward to the upcoming impact, even though it will occur on the sunlit side of the moon and therefore likely won't be visible to most observers here on Earth (though skywatchers with good telescopes might be able to catch a glimpse of the resulting ejecta plume).

The event "provides an opportunity to test pipelines for measuring flash properties to locate impact events seismically, and to better understand the multi-modal hazards posed to future lunar infrastructure and astronauts from space debris impacting the moon," Fernando and his colleagues wrote in their paper.

Those hazards won't be purely hypothetical for much longer, if all goes to plan: NASA aims to build a base near the moon's south pole over the coming decade via its Artemis program, and to keep that outpost staffed over the long haul. Scheiman said that SpaceX is looking into ways to minimize the chances that spent rocket bodies could rain down on an occupied moon in the future.

"It's one of the things that we're working in partnership with NASA and the other appropriate agencies," she said. "What is the best future disposal path for high-energy missions that are in the sun-Earth-moon system?"

This Falcon 9 won't be blazing an entirely new trail to the moon. The third stage of NASA's Saturn V moon rocket struck the lunar surface on multiple Apollo missions, for example. And, on March 4, 2022, a mysterious rocket body slammed into the moon, blasting out a weird double crater.

That shape revealed the impactor's identity — the upper stage of the Long March 3C rocket that sent China's uncrewed Chang'e 5-T1 mission around the moon in October 2014.