Look up at a full Moon on a clear night. What do you see? A face that tells a story. It’s been hit and worn down over four billion years. Those dark spots? They are massive basins created by colossal impacts that reshaped the Moon’s surface.
The lighter areas, known as highlands, are riddled with craters—each one a reminder of a collision from long before humans existed. Unlike Earth, the Moon has no weather to soften the harsh edges of these impacts. Once a space rock hits, it leaves a permanent mark.
This bombardment isn’t just a thing of the past; the Moon is constantly being hit. Every day, space rocks of all sizes crash into its surface, carving new craters. We often know this happens, but we rarely witness it directly.
In late spring 2024, something noteworthy occurred. A space rock traveling incredibly fast struck the Moon, creating a new crater 225 meters wide—about the length of two football fields. Thanks to NASA’s Lunar Reconnaissance Orbiter Camera, scientists could compare photos taken before and after the impact, helping them analyze the results in detail.
Before this, the largest crater observed during the Lunar Reconnaissance Orbiter mission measured only 70 meters across. This new crater is more than three times that size. Experts say impactful events of this magnitude should happen only once every 139 years in any given area of the Moon. So catching it shortly after formation is quite rare.
This new crater is funnel-shaped and 43 meters deep, with walls too steep to easily climb. Large blocks of rock, some measuring around 13 meters, were ejected during the impact. The way the debris is spread suggests the rock came from the south-southwest, creating a unique pattern.
Inside the crater, scientists discovered dark patches of material. These likely represent glassy rock, formed by the intense heat of the impact. This mixture of elements is a unique fingerprint left by such a massive collision.
What sets this discovery apart is the high-quality images taken at both stages. For the first time, scientists have before-and-after photographs of a crater this size, providing them with a rare dataset. This will help refine models used to understand how craters form, not just on the Moon, but across our Solar System.
Recent studies show that impacts on the Moon serve as crucial clues for researchers wanting to learn more about our cosmic neighborhood. This crater’s data will assist in understanding how similar events might affect other celestial bodies.
The research was presented during the 57th Lunar and Planetary Sciences Meeting and can be checked out here.
With each impact, the Moon continues to evolve, giving us insight into its mysterious past and how it shapes our understanding of the universe.
