Moon's Deepest Rocks May Be Walking Distance from Artemis Landing Sites

The Moon has been keeping a secret buried deep in its mantle for billions of years — and it may have accidentally left that secret sitting on the surface near where humans are planning to land. New simulation work published via Science Daily reconstructed the colossal impact that formed the South Pole-Aitken basin, the Moon's largest and oldest crater, and the results are remarkable: the geometry of the strike matters enormously. A low-angle impact from a large, iron-cored impactor didn't just excavate the surface — it blasted material upward from deep inside the Moon, scattering mantle rocks across the region. This is not a minor geological footnote. The lunar mantle is the layer beneath the crust that planetary scientists have never directly sampled. Understanding its composition would answer foundational questions about how the Moon — and by extension the early Earth — formed and evolved. Every sample returned from Apollo missions came from the crust. Mantle material has remained out of reach. If this simulation holds, future Artemis astronauts could pick up those answers with a gloved hand. The South Pole-Aitken basin stretches roughly 2,500 kilometers in diameter and descends nearly 8 kilometers deep — it is one of the largest confirmed impact craters in the entire solar system. The new modeling suggests the impactor's angle and iron core were the critical variables that drove deep material upward rather than simply outward. That specificity gives mission planners something actionable: not just 'go to the South Pole,' but go to particular ejecta fields where mantle signatures are most likely concentrated. For everyone who has ever looked up at the Moon and wondered what it is made of at its core, this is a genuine step toward an answer. No politics required. No billion-dollar instrument needed beyond boots and a sample bag. The Moon, it turns out, may have done some of the excavation work for us — 4 billion years ago.