Woah, Look What Just Hit the Moon! Scientists Discover a 'Once-in-a-Lifetime' Crater

Imagine looking up at the Moon and realizing it just got a brand-new, absolutely massive scar – one so big it’s the largest fresh crater ever spotted by us humans during our monitoring efforts! That’s exactly what happened thanks to NASA’s trusty Lunar Reconnaissance Orbiter (LRO). Scientists are incredibly excited about this find, affectionately named McGetchin crater, which truly is a 'once-in-a-lifetime' discovery.

This impressive newcomer, a whopping 728 feet (that’s 222 meters, folks!) wide and about 141 feet (43 meters) deep, appeared on the Moon's eastern edge sometime between April 11 and May 22, 2024. Think about that for a second: an object roughly the size of a three to six-story building slammed into our celestial neighbor, creating a crater so significant it’s expected to happen only once every 132 years on the lunar surface. It truly puts things into perspective, doesn’t it?

The previous largest contemporary crater we knew of was a modest 230 feet (70 meters) in diameter. So, McGetchin crater? It absolutely dwarfs that one, securing its place as a truly unique event. This colossal impact likely came from a rogue comet or an asteroid, and the sheer scale of it offers scientists an unparalleled opportunity to study how such large objects affect planetary bodies like our Moon.

The credit for this fantastic discovery goes to Robert Wagner, an image-processing specialist at Intuitive Machines, who first spotted the massive new divot on October 24, 2025. Then, in December 2025, the LRO's Narrow-Angle Camera (NAC) zoomed in for an incredibly detailed close-up, confirming the crater's immense size and revealing its fresh, sharp features. It's a testament to the LRO, launched all the way back in 2009, still doing incredible work!

Adding another layer to this intriguing story, the LRO’s Diviner thermal instrument also picked up on something fascinating: a four-mile (6.4 kilometers) wide area around the crater that was a full 16 degrees Fahrenheit cooler at night. This 'thermal anomaly,' as they call it, hints at the disturbed lunar material around the impact site. Tyler Powell, a planetary scientist from Johns Hopkins University, is even leading a second paper to delve deeper into this thermal data, showing just how much there is to unpack here.

The crater has been named in honor of Dr. Thomas McGetchin, a revered Apollo-era lunar scientist whose legacy continues to inspire. This is a beautiful way to acknowledge the past while celebrating a monumental new discovery that pushes our understanding forward. Mark Robinson, a principal investigator for the Lunar Reconnaissance Orbiter Camera, and a study coauthor, highlighted the importance of observing such a fresh, massive impact.

When you consider the impactor, it brings to mind events like the Chelyabinsk meteor that rocked Russia in 2013. That asteroid, while causing quite a stir, was estimated to be only about 55 to 65 feet (17 to 20 meters) in size. The object that carved out McGetchin crater was many times larger, a truly powerful force of nature. As Jeff Andrews-Hanna, a professor at the University of Arizona, eloquently put it, this discovery is truly exciting because it shows us how quickly the lunar surface can change and how much we can still learn.

Ultimately, finds like McGetchin crater are invaluable. They not only deepen our understanding of lunar geology and the frequency of cosmic impacts, but they also feed directly into future exploration efforts. With NASA's Artemis program aiming to send humans back to the Moon for long-term stays, knowing more about these kinds of events and how they shape the lunar surface becomes incredibly important. It's a thrilling time to be looking up!