Category: The moon

Microbes from Earth might survive the harsh surface of the moon, albeit in a state of suspended animation, a new study finds.

Previous research suggested the surface of the moon was too harsh for microbes to survive. Specifically, a 2019 study found ultraviolet rays and heat from the sun are the greatest barriers for microbial life on the lunar surface.

However, this prior work did not account for the shelter that hills and valleys might supply on the moon. These could prove especially significant at the lunar poles, where the sun never climbs high in the sky, leading to permanently shadowed regions that can host ice — and perhaps more.

In the new study, researchers analyzed three kinds of bacteria and two kinds of fungus. These are all commonly found on crewed space missions, and include microorganisms that prior work discovered were especially durable in the harsh conditions of space. Previous research found these lifeforms are resistant to vacuum, cold and high-energy particles.

The scientists compared previously compiled survivability data of these microbes with lunar maps that captured ultraviolet and heat readings on the moon's surface. They found that both lunar poles likely have areas where microbes could survive, albeit in a state of suspended animation known as cryptobiosis in which they could not move or grow unless more hospitable conditions appeared.

Microbes might not need much in the way of shelter on the moon. "Even a bootprint or a rover's tread may create a habitable area," study co-author Prabal Saxena, a planetary scientist at NASA Goddard Space Flight Center in Greenbelt, Maryland, told Space.com.

NASA's Artemis III mission is planned to be the first time humans will explore the lunar south pole. "Our findings show that we need to be even more thoughtful about the materials that we might unintentionally take with us when we are exploring space, and the impacts that we might have," study co-author Heather Graham, an organic geochemist at NASA Goddard Space Flight Center, told Space.com.

In addition to the possibility that missions to the moon might bring microorganisms there, the scientists added it might be possible that ancient cosmic impacts might have blasted rocks bearing microbes off Earth that could have landed on the moon. "The moon might be like Earth's freezer, preserving really interesting bits of evidence of Earth's past if they landed at the moon's poles," Saxena said.

Future experiments may test just how well microbes of many kinds might survive on the moon, Saxena said. "We have this great opportunity to really think about the limits of life and how resilient it is even in incredibly extreme environments," he said.

All in all, "the moon is a really diverse and interesting body, and the lunar poles are really unique regions in terms of how they can trap volatiles like water, and the ability to trap life," Saxena said.

The scientists detailed their findings online Aug. 19 in the journal Science Advances.

NASA's veteran moon-circling spacecraft, the Lunar Reconnaissance Orbiter (LRO), has imaged the impact site of that errant Falcon 9 upper stage.

The photos were taken on Aug. 11 and Aug. 12, just a few days after the SpaceX rocket body slammed into the moon near Einstein Crater at 5,400 mph (8,690 kph).

LRO's high-resolution camera system, known as LROC, got good views of the aftermath from a variety of angles, snapping away every 117 minutes, the time it takes the orbiter to circuit the moon.

Diameter and depth

According to LROC Principal Investigator Mark Robinson, who's based at the Houston company Intuitive Machines, the newly formed impact crater is about 60 feet (18 meters) wide and appears to be less than 10 feet (3 m) deep.

"The distinctive V-shaped ejecta pattern on the south side of the crater is consistent with natural impactors hitting the moon at low angles relative to the surface," said Robinson.

The sixth (and final) image in LROC's sequence of the new crater, he added, was acquired with the largest slew angle (68 degrees), presenting a view similar to what an Artemis astronaut would see looking out his or her Orion spacecraft window toward the lunar horizon.

Telling tilts

To capture imagery of the impact site, LRO operators tilted the spacecraft so its cameras would point toward the target region each time the spacecraft passed about 60 miles (97 km) above the moon. In doing so, researchers could see the crater under multiple lighting conditions that revealed impact features.

According to NASA, the LRO imagery shows bright and dark rays stretching out from the crater.

"The darker streaks are made of surface dust and rocks altered over a long time by solar wind, galactic cosmic rays, and micrometeorite impacts. This weathered material was excavated by the collision," with the brighter streaks near the crater rim formed by "fresh material excavated from deeper underground," NASA officials said in an Aug. 18 statement.

Korea's lunar orbiter

The site of the Aug. 5 crash was imaged earlier by the Korea Pathfinder Lunar Orbiter, also known as Danuri. That mission team used Danuri's high-resolution Lunar Terrain Imager to spot the new crater. After capturing images of the impact zone, the Danuri mission sent updated crater coordinates to the LRO team to help refine their follow-up imaging sequence, NASA officials said.

Wandering through space for over a year and a half, the leftover Falcon 9 upper stage had sent two robotic landers — Firefly Aerospace's Blue Ghost and Resilience, built by the Japanese company ispace — toward the moon back on Jan. 15, 2025. Blue Ghost succeeded in its lunar touchdown, but Resilience crashed during its attempt.

Chinese researchers have presented a new map of the moon, updating a previous edition based on new scientific findings and recalibrating the moon's ancient geologic eras.

The comprehensive map of the moon, with a scale of 1:5 million, was unveiled by the Institute of Geology, Chinese Academy of Geological Sciences (IGCAGS) on Aug. 6. The map is an update of a 2024 edition and puts forward new boundaries for the ancient Aitkenian, Nectarian and Imbrian lunar periods. (The researchers use the term Aitkenian, whereas the term pre-Nectarian is often used to describe the lunar geologic period from roughly around 4.5 billion to 3.9 billion years ago.)

The map also uses reprocessed spectral data to update areas of KREEP terrane, which features crustal material enriched in potassium (K), rare-earth elements (REE), and phosphorus (P), and is found to be more continuous and abundant than previously estimated.

"The lunar geologic history has indeed been rewritten — more precisely, refined and systematized," the state-run outlet Xinhua quoted Yang Zhiming, director of the IGCAGS, as saying.

Both the United States, through the Apollo missions, and the Soviet Union delivered lunar samples to Earth more than 50 years ago, greatly shaping research on and understanding of the moon. China's own robotic sample return missions, Chang'e 5 and Chang'e 6, launched in 2020 and 2024, respectively, have provided fresh materials and new insights.

Chang'e 6 was the first sample-return mission to the lunar far side. Chinese researchers say the returned material will provide a new starting point for scientific discussions on the nature of that hemisphere of the moon, which is hidden from view on Earth.

The map "introduces a proprietary cartographic standard," according to Xinhua, amid a wider, Chinese government-driven initiative to influence global standards. In terms of space, aspects of the map such as the color scheme, geologic logic and an aesthetic "lighter for younger, darker for older" principle will be applied more broadly as China looks to expand its exploration beyond the moon and into the outer solar system.

"This goes beyond showcasing technological soft power. This standard will be extended to future planetary geologic mapping, establishing an independent intellectual property framework for China's deep space exploration," Yang said.

Both China and the United States have interests in setting standards as humanity renews its interest in exploring the moon. While on Earth everyone agrees on Coordinated Universal Time (UTC), the two countries currently disagree about what time it is on the moon, where clocks run faster due to weaker gravity. This suggests that leadership in space will be contested not just through missions and firsts, but via whose technical standards are followed, with China's new map playing into these efforts.

An 8,800-pound (4,000 kilograms) Falcon 9 rocket stage hit the moon last Wednesday (Aug. 5), stirring lunar regolith in a massive plume of dust observable all the way from Earth.

The rocket joined some 3,000 manmade objects scattered on the surface of our planet's companion. Some experts think it's about time we start treating the pristine lunar environment with a bit more respect.

Around 200 tons of Earth stuff have been either deliberately left on or crashed into the moon since the beginning of the space age. Some of this material has a prominent place in history books: The descent modules from all six Apollo landing missions, Soviet Lunakhod rovers from the 1970s and China's 2010s Yutu 1 and 2 robots still sit where they had been left or ran out of power.

But there is also a lot of stuff on the moon that wasn't really meant to end up there. Astronomer and space historian Jonathan McDowell says that many rocket stages and other objects left in orbit between Earth and the moon since the first lunar missions in the 1960s may have ended up on the gray dirt. Four years before the Falcon 9 upper stage crashed near Einstein Crater, for example, part of a Chinese Long March 3C rocket slammed into the moon's far side. And experts think such incidents could become increasingly common in the coming years, as exploration of the moon intensifies.

"We're in a transitional moment," McDowell told Space.com. "From the era when there was rare lunar exploration mostly by the U.S. and the Soviet Union, we've seen over the past decade other nations landing on the moon and the beginning of commercial missions. But governance has not kept up with this. We don't have an international set of agreements on how to operate near the moon, how to coordinate activities near the moon, and we're really going to need it because, not only is the amount of activity at the moon increasing, but the number of different players is greatly increasing, too."

Human activities on the moon are governed by the 1967 United Nations Outer Space Treaty, Marieta Valdivia Lefort, a policy officer at the Royal Astronomical Society in the U.K., told Space.com. Article IX of that treaty binds countries to "conduct the exploration of outer space in a way that avoids harmful contamination," she said. But what exactly constitutes such contamination is unclear, she added.

"There are international legal frameworks that apply to activities on the moon and include obligations concerning harmful contamination, but there is no dedicated international 'waste law' or comprehensive 'rubbish-management' system for it," Lefort wrote in an email. "The Outer Space Treaty does not define when contamination becomes 'harmful.' It does not set numerical waste limits, create approved disposal sites or require every object on the moon to be removed."

The moon is big. Its surface area, around 14.7 million square miles (38 million square kilometers) rivals that of Asia, Earth's largest continent, which covers 17 million square miles (44 million square km). But the moon's low gravity — around 17% that of Earth — means the dust that an impact stirs up travels a long way and takes a long time to settle, McDowell said.

"It's not just a local event," he said. "It's an equivalent to a continental-level event. In the future, when you have permanent human bases and scientific experiments on the moon, you don't want rocket stages smashing into the moon on a regular basis, creating big plumes of dust that could contaminate instruments or disturb gravitational wave detectors."

Moreover, the artificial material introduced and the craters that arise when heavy rocket stages smash into the lunar surface are altering the lunar environment, potentially erasing yet unexplored scientific material.

"The moon is naturally struck by meteoroids, and those impacts form part of the geological record that scientists are trying to understand," Lefort wrote. "The main concern is the alteration of the moon's physical and chemical environment, particularly where repeated disturbances could damage or obscure valuable scientific evidence."

Gregory Radisic, a space law expert at Australia's Bond University, told Space.com that the Falcon 9 crash was timely, as it can stir debate about responsible behavior in space before the moon gets too busy.

"It's not by good planning that this didn't hit something important," he said. "It's by pure luck that we're only having a conversation about theoretical problems down the line and that this did not destroy a million-dollar experiment or an important site of scientific study."

He added that spaceflight companies may start paying attention to the risks only after human lives are lost or expensive infrastructure suffers, resulting in tangible fines and consequences.

"When there is a loss of life or a loss of investment, the industry will start to care," Radisic said. "As long as things are losing aesthetic or scientific value, the industry is not likely going to care."

The Falcon 9 rocket stage that hit the moon was left in a high-altitude orbit around Earth in January 2025, after it propelled Firefly Aerospace's Blue Ghost and ispace's Resilience landers to the moon.

McDowell explained that, as the rocket stage was left relatively close to the moon, it got repeatedly influenced by lunar gravity, eventually spiralling into its surface.

"If you leave [an object] in an orbit that's in this middle region that is far enough that the moon's gravity is affecting it but not far enough out to go into orbit around the sun, then that orbit is very hard to predict," McDowell said. "The orbital uncertainties multiply over many passes and, eventually, if you get unlucky, the moon tugs it into an orbit where it's going to hit either the moon or Earth in a completely unpredictable way."

McDowell said that, since the January 2025 launch, SpaceX has been pushing its moon-mission rockets farther out into orbit around the sun.

"I hope that we're going to see a new norm evolve, and that what we have seen now is not how you dispose of your rocket stages in the future," he said. 


NASA has formally invited India to participate in its effort to build a permanent base near the moon's south pole, adding a new dimension to the deep-space cooperation between the two countries.

The invitation was extended last week at the Indian space agency ISRO's headquarters in Bengaluru during the ninth meeting of the U.S.-India Civil Space Joint Working Group. The CSJWG was established in 2005 as a mechanism for bilateral space cooperation and for addressing challenges and pursuing mutual spaceflight goals.

"Building on our successful collaboration in science, NASA reaffirmed its interest in @ISRO joining Moon Base. We're going back to the moon to stay — and we're bringing our partners with us," NASA officials said via X on Tuesday (Aug. 11).

Beyond the lunar base invitation, "the two sides also agreed to advance discussions for cooperation on open scientific data sharing under the Accords," reads a Tuesday statement by the U.S. Embassy in India.

"The Accords" are the Artemis Accords, the U.S.-led diplomatic framework outlining principles for safe and responsible exploration of the moon and beyond. India signed on as the 27th signatory in 2023, joining a coalition that has now grown to 70 nations.

Official statements have provided few details on what India's participation in the Moon Base program would entail in practice. The meeting, however, brought together senior space officials from both countries, including V. Narayanan, the chairman of ISRO and secretary of India's Department of Space, and Sergio Gor, the U.S. Ambassador to India, who addressed the opening session, according to the statement.

The meeting was co-chaired by M. Sankaran, director of ISRO's U.R. Rao Satellite Centre, on the Indian side, and two people on the U.S. side — Wesley Brooks, assistant secretary of state for the U.S. Department of State's Oceans and International Environmental and Scientific Affairs, and Kathleen Karika, NASA associate administrator for International and Interagency Relations, the statement reads.

Over the coming decade, via its Artemis program, NASA plans to build out a sprawling, city-like base near the moon's south pole, a region of particular interest thanks to permanently shadowed craters there that are thought to contain substantial deposits of water ice.

Details of the planned architecture shared by NASA in May envision hilltop habitats to take advantage of sunlight and nuclear power systems located farther away to mitigate radiation risks. The space agency also plans to use small, hopping robots starting in 2028 to scout the south polar region ahead of moon base construction.

This effort to gather information and secure access to the surface is the first of three planned phases. Phase 2, from 2029-2032, is intended to establish the base's initial operating capability. Phase 3, from 2032 onward, aims to achieve a semi-permanent crew presence on the lunar surface, NASA said during the May update.

To prioritize infrastructure that supports sustained operations on the moon's surface, increase launch cadence and keep pace with China's lunar ambitions, NASA earlier this year paused development of its long-planned Gateway space station.

For India, the invitation to join NASA's Moon Base program comes as the country pursues its own ambitious lunar exploration and human spaceflight roadmap. Its plans for the 2040s include developing a moon base, establishing a space station in lunar orbit and sending Indian astronauts to the moon, with the broader goal of building long-term human presence beyond Earth.

The moon dust has settled after a 4.5-ton SpaceX rocket body slammed into terrain near Einstein Crater on Aug. 5.

That impact site was imaged by South Korea's moon-orbiting Danuri spacecraft, as well as by NASA's Lunar Reconnaissance Orbiter (LRO). Reportedly, a Chinese commercial space debris monitoring satellite tracked and recorded the 5,400-mph (8,690-kph) moon punch, too.

Wandering through space for over a year, the leftover Falcon 9 upper stage had sent Firefly Aerospace's Blue Ghost-1 lander on its way to the moon back on Jan. 15, 2025. Also sent moonward on that flight was the Hakuto-R Mission 2's Resilience, a robotic lunar lander developed by the Japanese company ispace. While the moon has reclaimed its serenity, the implications of the uncontrolled collision continue to reverberate.

Close encounter

Interestingly, there was also the prospect of a too-close-for-comfort conjunction of the Falcon 9 upper stage and Danuri.

"We noticed roughly late June that there is an incoming Falcon 9 upper stage toward the moon, and also knew that it would be close to Danuri," Eunhyeuk Kim, a senior researcher at the Korea Aerospace Research Institute (KARI), told Space.com.

There was a huge uncertainty in the predicted trajectory of the upper stage, Kim said, while the orbit information of South Korea's Danuri lunar orbiter was quite accurate. "Therefore, we could not neglect the probability of an incoming and close encounter."

Spacecraft maneuver

However, around mid July, the KARI/Danuri team performed a maneuver of the spacecraft in preparation of a near-total lunar eclipse on Aug. 28, said Kim. That eclipse will see 96% of the moon's visible surface passing through Earth's dark umbral shadow.

Kim said that the orbiter's maneuver brought a slight change in the phase of the spacecraft's orbit, which canceled the probable conjunction between the upper stage and Danuri.

At the time of the Aug. 5 impact, Danuri was flying over the moon's south pole area, far away from the hit zone, said Kim.

High-speed ejecta

Dean Sladen is a quality manager and aerospace engineer in the United Kingdom for Accu Components, a high-precision manufacturing firm.

"As space agencies and private companies build out permanent lunar infrastructure, uncontrolled rocket stages evolve from a minor nuisance into a tangible operational risk," Sladen told Space.com. "A direct hit is the obvious worst-case scenario, but distant impacts also generate ground shocks and high-speed ejecta that can degrade sensitive equipment over time."

Sladen noted that lunar impacts have been a constant throughout history, with meteorites and comets bombarding the surface unhindered by an atmosphere. "Over the past 65 years, artificial objects have added a new dynamic to these events," he added.

Genuine hazard

Even modest hardware impacts permanently alter the lunar landscape, said Sladen. Given the moon's lack of a substantial atmosphere, there is no air resistance to slow debris down. An impact therefore hurls high-speed ejecta (fine regolith and rock fragments) across vast distances at bullet-like speeds.

"While this isn't a major threat to isolated missions today, as we establish permanent lunar infrastructure, high-velocity ejecta poses a genuine hazard to surface habitats, solar arrays and working astronauts," Sladen said.

To mitigate this issue, Sladen suggested that the industry will likely need designated impact zones or strictly controlled, targeted de-orbit protocols to ensure that spent hardware lands far from active installations.

"That said, human-made debris is only half the equation," Sladen continued. "Natural meteorites remain an ongoing background threat, and, while massive natural strikes are rare, they hit at significantly higher speeds and carry far more energy," Sladen said. "Controlling our own hardware is simply the part of the risk profile we actually have the power to manage."

Plume detections

In the meantime, while the Falcon 9 impact was tough to see from Earth, several observations from our planet reported the detection of sodium and lithium gas above the crash site.

The European Southern Observatory's (ESO) Very Large Telescope (VLT) in Chile, for example, saw the aftermath of the impact. The ESO reported that a chemical fingerprint of the impact was visible for five to 10 minutes, with an enormous plume of lunar material stirred up due to the hard-hitting hardware.

"I'm happy that ESO recorded some evidence of it through VLT, and Danuri has found the exact impact location," said William Jo, a graduate research assistant at the University of Texas, Austin who performed some pre-strike computer simulations.

"What we've learned so far is that the plume was too faint to see against the bright lunar surface, and only a large observatory telescope could pick some parts of it out against the dark sky, which is exactly what happened," Jo told Space.com. "The plume must have shot out high," he said, "and I'd like to know how high, or even whether we can replicate the signals."

Targets of opportunity

"Telescopes make the best spaceships," pointed out Elaina Hyde, director of the Allan I Carswell Observatory at York University in Canada. "We are always on the lookout for 'targets of opportunity' like this event."

Hyde organized a livestream event, training the observatory on the collision locale. They were unable to spot the impact, however.

"The lunar collision was not on our regular research program, but when it happened, we put it as a high-priority item to observe if the weather was clear," Hyde said. "Anything that happens quickly like this is often a target of opportunity, because you do not get a long time to plan the observation."

"However, since it was not visible from our location in Toronto, our 'null' or non detection can actually help to limit the estimates on how big the dust plume was and perhaps some of its properties," said Hyde.

Impact response

Also on the moon impact watch were observers using Lowell Observatory equipment in Arizona.

These researchers managed to measure a response from the rocket stage impact, spotting a sizable sodium and lithium gas plume that lasted between five and 10 minutes after impact, reported Carl Schmidt, an assistant research professor at Boston University's Center for Space Physics.

Observers at the 4.3-meter Lowell Discovery Telescope (LDT) in Happy Jack, Arizona used a long slit spectrograph to detect the plume. Graduate students from Boston University continue to analyze data gleaned from the moon wallop.

Bright lithium plume

"At LDT, we saw a bright lithium plume from the rocket body and fainter sodium [signature], likely from the surface itself," Patrick Lierle of Boston University told Space.com. "The bright lithium plume extends more than halfway up our field of view." The LDT results are also credited to Emma Lovett, a Boston University graduate student.

William Jo said he's looking forward to the release of observational data about the impact before he and colleagues can refine their lunar ejecta simulation model.

"That data, combined with our simulations, could tell us things like the composition of the lunar material, what orientation the impact hit at, and so on," Jo said.

As usual, SpaceX is dreaming big.

The company plans to build factories on the moon, using robots to do much of the heavy lifting, Elon Musk said on Tuesday (Aug. 4) during SpaceX's first-ever quarterly earnings call.

"We are going to land a lot of tonnage on the moon," he said. "We're going to build the factories on the moon. The robots will be helpful with that."

This is not a newly revealed vision; Musk first laid it out in February, in a blog post that announced SpaceX's purchase of xAI, a company that the billionaire entrepreneur founded in 2023. But Musk doubled down on it this week, showing investors that off-Earth manufacturing is very much front-of-mind for SpaceX.

The factories in question will build SpaceX's Starmind AI satellites, if all goes according to plan. The company aims to operate a million-strong Starmind constellation in Earth orbit in the coming years, and then go farther afield with the craft after that.

Eventually, SpaceX wants to launch locally made Starmind satellites off the lunar surface using electromagnetic mass drivers — basically, extremely powerful rail guns.

"Using robots on the moon to scale up manufacturing on the moon — which, I know it sounds, like, super sci-fi right now, but it's going to happen — will enable us to build the mass accelerator on the moon," Musk said.

"And if you have a mass accelerator on the moon, and you have solar and radiator production on the moon, you can — I know this sounds totally nuts — but you can you can probably scale to 1,000 times the economy of Earth in terms of intelligence launched to space, but probably, you know, maybe even a million times," he added.

"Solar and radiator production" refers to the manufacture of key Starmind satellite components: solar panels to power them and radiators to dump the large amounts of heat they'll produce into the vacuum of space.

Musk didn't provide details about the robotic lunar labor force. But he's presumably counting on Optimus, a humanoid robot built by another one of his companies, the carmaker Tesla. Musk has previously said that SpaceX will launch some Optimus units to Mars in the near future, to help pave the way for human settlement of the Red Planet.

Those robots will fly on Starship, SpaceX's fully reusable next-gen megarocket, which is currently gearing up for its 14th test flight. Indeed, Starship is key to most of the company's plan's both in Earth orbit and beyond.

"Starship aims to quadruple payload capacity and reduce launch costs by 10 times compared to our Falcon 9 rocket, unlocking significant capabilities across all of our business segments," SpaceX Chief Financial Officer Bret Johnsen said during Tuesday's earnings call.

"We continue to make progress building the infrastructure required to support thousands of Starship launches per year, including accelerating Raptor and launch vehicle production, the buildout of our gigabays, and making significant progress towards activating multiple launch pads at Starbase and in Cape Canaveral at Pad 39A and Pad 37," he added. (Raptor is the engine that powers Starship, and Starbase is SpaceX's South Texas site, which serves as the current hub of Starship manufacturing, testing and launch activities.)

Tuesday's call was a landmark for SpaceX — its first as a publicly traded company. Musk founded SpaceX as a private concern in March 2022 and took it public this past June, via the richest IPO in history.

The IPO raised $86 billion and valued SpaceX at $1.77 trillion. Only six American companies had higher market capitalizations at the time — NVIDIA, Apple, Alphabet (Google), Microsoft, Amazon and the semiconductor manufacturer Broadcom. (Market caps fluctuate all the time, going up and down with companies' stock prices.)

The main point of Tuesday's call was to discuss SpaceX's first-ever earnings report, which covered the second quarter of this year. The company's revenue over that stretch was $7.8 billion, a 92% increase over the same period in 2025, according to the report. SpaceX lost more money than it made during Q2 2026, but the shortfall was considerably smaller than in Q2 2025 — $541 million versus $1.0 billion.

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.