Artemis II Astronauts Saw 6 Meteorites Slam into the Moon

Houston Mission Control screamed with delight.

09 Apr 2026, 17:41 by Tibi Puiu · ZME Science

This shot, captured as the Orion spacecraft swung around the lunar far side, is the 21st-century successor to Bill Anders’ iconic Apollo 8 photograph. Image: NASA

For more than half a century, we’ve relied on robotic orbiters and distant telescopes to map the moon’s ancient scars.

But on Monday, as the Artemis II spacecraft flew between 6,000 and 7,000 kilometers above the lunar far side, the human crew saw new craters forming before their eyes. They watched the moon take a beating.

“That was definitely impact flashes on the moon. And Jeremy (Hansen) just saw another one,” mission commander Reid Wiseman reported to Earth.

Wiseman and his crewmates were witnessing micrometeorites slamming into the lunar surface. Traveling at tens of kilometers per second, these space rocks vaporized upon impact. The violent collisions generated brief, brilliant flashes of light.

The crew eventually logged up to six separate impact flashes. Ground teams are now racing to match the crew’s visual reports with orbital satellite data.

A Sudden Spark in the Dark

How could the astronauts spot a tiny flash of light from thousands of kilometers away? Remember that during the spacecraft’s closest lunar approach, the moon slipped directly in front of the sun. This created a dramatic solar eclipse for the crew that lasted nearly an hour.

On Earth, a total solar eclipse is a fleeting, three-minute coincidence of cosmic geometry. From the cockpit of Orion on April 6, 2026, it was a nearly hour-long experience of orbital mechanics. As the Moon’s massive bulk slid in front of the Sun, the crew was treated to 54 minutes of deep-space totality. This shot captures the Sun’s corona bleeding out into the darkness, a shimmering atmospheric halo that usually requires specialized telescopes to see. But look closer: you can see actual stars puncturing the blackness, and on the left, a faint, ghostly Earthlight reflecting off the lunar crust. It’s surreal. Image: NASA

The eclipse plunged the far side of the moon into near-absolute darkness. That extreme visual contrast allowed the astronauts to perceive the faint, fleeting bursts of light with their naked eyes.

Unfortunately, the spacecraft’s cameras failed to capture the impacts. The flashes simply vanished too quickly for the camera shutters to record them.

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When asked about the duration and color of the strikes by Artemis 2 lunar science lead Kelsey Young, the crew painted a vivid picture.

“Were they prolonged? And did you notice any color?” Young asked the crew.

“I would say they were a millisecond, like the fastest a camera shutter can open and close,” Wiseman replied, describing the flashes as “white to bluish white.”

“It’s a pinprick of light,” Canadian crew member Jeremy Hansen added. “I would suspect there were a lot more of them.”

“To me there was no doubt we were seeing it, and we were all seeing it,” Wiseman confirmed.

Screams of Delight in Houston

On April 6, 2026, the Artemis II crew snagged this high-contrast look at Vavilov Crater, a relative newcomer perched on the edge of the ancient, massive Hertzsprung basin. By catching the crater right at the terminator — the sharp line where lunar day becomes a cold, brutal night — the long shadows reveal the true grit of the terrain. You can see the distinct transition from the smooth interior flows to the jagged, ejecta-scarred rim. It’s a spectacular, albeit forbidding, reminder that the Moon isn’t just a white light in the sky; it’s a geologically complex, battered landscape waiting for boots on the ground. Image: NASA

Back on Earth, the reaction from the scientific community was electric. Observing real-time lunar impacts from a spacecraft is exceptionally rare.

Young tracked the spacecraft from more than 400,000 kilometers away. She summed up her initial reaction in one word: “Amazed!”

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“I don’t know if I expected to have the crew see any on this mission, so you probably saw the surprise and shock on my face,” Young told reporters at a press briefing.

In the mission control room in Houston, the astronauts’ reports triggered “audible screams of delight,” from the gathered scientists.

The science teams had extensively trained the crew to look for exactly this phenomenon before they ever left the launch pad. Still, no one expected such a high yield.

“I’m personally… surprised they would see that many, although they (had) been trained to look for them,” said Bruce Betts, chief scientist at the Planetary Society.

Mission backup astronaut Jenni Gibbons emphasized just how exceptionally rare witnessing something like this should be.

“They were really high-priority science for us, so the fact that they saw four or five was just outstanding,” Gibbons said.

Just How Big Were These Rocks?

Moon craters seen during Artemis II mission. Credit: NASA.

If a flash of light is visible to the naked eye from 6,000 kilometers away, does this mean the space rocks were large? Astronomers know that objects larger than one meter across can gouge out substantial craters, but those massive impacts remain extremely rare. Most everyday space debris consists of tiny micrometeorites. Yet, the flashes the Artemis II crew saw required something with a bit more mass.

“It’s not a piece of dust, but it’s not a meter-size boulder, either,” Betts explained.

The exact size remains a mystery for now. However, these firsthand descriptions will help researchers to refine their existing impact models.

Betts pointed out that the data will allow scientists to “get some idea of the frequency of impact” as well as calculate the size of the incoming projectiles.

The Real Threat to Future Lunar Bases

The moon is a harsh environment. It’s littered with pockmarks for a reason. Here on Earth, our thick atmosphere acts as a planetary shield.

Incoming space rocks generally burn up high in the atmosphere due to friction, before they can threaten anyone on the ground, Betts said.

The moon lacks this protective atmospheric layer. Every single piece of space rock — no matter how small — strikes the lunar surface at full velocity. The millions of overlapping craters scarring the moon’s surface are visual proof of this relentless bombardment.

“There is more of a challenge on the Moon,” Betts added, referring to the challenges faced by humans staffing a potential permanent outpost on the moon.

In space, even a small pebble acts like a high-energy bullet. A micrometeorite can easily puncture thin materials, destroy solar panels, or compromise a pressurized habitat.

Space agencies already anticipate these risks. Future lunar spacesuits will use multilayered fabrics and pressure sensors. Lunar habitats will require heavy shielding, or perhaps even placement inside natural lunar caves, to survive the constant rain of rock.

But the sheer number of strikes seen in just a few hours suggests we still have much to learn before humans set up permanent camp.

The Artemis II observations show that the “daily flux of meteors should be monitored more closely in the future before a lunar base is established,” cautioned Peter Schultz, Professor Emeritus of Geological Sciences at Brown University.

Despite the danger, the mood within NASA remains fiercely optimistic.

“Spirits are very high,” Young said. “We did what we set out to do. The Lunar Science Team and the crew prepared extensively.”

For the agency, this historic flyby proved that putting human observers back into deep space pays immediate scientific dividends.

“This is absolutely everything we hoped for by integrating science into flight operations,” Young said. “Science enables exploration, and exploration enables science.”