NASA’s Lunar Reconnaissance Orbiter (LRO), now in its 17th year circling the Moon, has revealed a massive new impact crater that scientists say is the largest newly formed crater observed in the solar system since systematic monitoring began.
Impact Details
The crater, named McGetchin crater in honor of the late Apollo‑era lunar scientist Dr. Thomas McGetchin, measures about 728 feet (222 meters) across and reaches 141 feet (43 meters) deep—roughly the length of two football fields and tall enough to stack three school buses. Researchers estimate the impactor was a space rock the size of a three‑to‑six‑story building that struck the Moon’s eastern edge between April 11 and May 22, 2024, though the event went unnoticed at the time.
Scientific Significance
According to a study published in Science Advances, crater‑production models predict an impact of this magnitude should occur only once every 132 years on the Moon, making the discovery statistically rare and effectively once‑in‑a‑lifetime.
Co‑author Mark Robinson, principal investigator for the LRO Camera at Intuitive Machines, expressed surprise at the find, noting that “I am surprised almost every day when I come into work and look at the latest images from the Moon.” The LRO’s suite of seven instruments, including high‑resolution cameras and the Diviner thermal sensor, enabled researchers to map the crater’s dimensions and assess its effect on surrounding terrain.
Cold‑Spot Phenomenon
Analysis of Diviner data revealed a “cold spot” extending roughly four miles (6.4 kilometers) around the crater, where nighttime temperatures are about 16 °F cooler than the surrounding area. Lead author Tyler Powell of Johns Hopkins University explained that fresh impacts can create a fluffier surface layer that retains less heat, offering a natural laboratory for studying lunar regolith dynamics.
Implications for Future Moon Missions
Understanding the frequency and scale of lunar impacts is crucial as NASA’s Artemis program prepares for sustained human presence on the Moon. The new crater provides a real‑time case study of how impacts can alter the lunar environment, information that will help planners design safer habitats and infrastructure.
Intuitive Machines image‑processing specialist Robert Wagner, who first spotted the crater in October 2025 while comparing before‑and‑after LRO images, described the discovery as “by far the most obvious impact debris pattern” he has ever seen.
Broader Context
While the Moon lacks an atmosphere to shield it from space debris, Earth’s protective envelope makes such large impacts far less common on our own planet. Nonetheless, the event serves as a reminder of the importance of tracking near‑Earth objects, a task that remains a priority for planetary defense initiatives.
Scientists anticipate that continued monitoring by LRO and future lunar missions will uncover additional impact sites, further enriching our understanding of the Moon’s dynamic surface and its role in the broader solar system.
Original reporting: KEYT (Ventura/Santa Barbara) — read the source article.
