Small, frozen, and silent, the Moon has a surprising distribution of magnetic fingerprints across its dusty surface, not all of which are easy to explain away.
across its dusty surface, not all of which are easy to explain away.
"Lunar magnetic anomalies have been a mystery since the Apollo era," write Guo and colleagues in their"Therefore, an in-depth understanding of the formation mechanism and distribution characteristics of magnetite on the Moon could provide a new perspective to explain the genesis of magnetic anomalies in the lunar crust."
For planetary scientists, the presence of magnetite is crucial: it can be used to trace back magnetic fields through history, as well as spot, two of the most important research discussions around any planet or moon. That doesn't mean it can't happen. Tiny grains of magnetite have previously been found in Moon dust, but those studies proposed the magnetite formed at relatively low temperatures – and not under high-pressure, high-temperature conditions of an impactor slamming into the Moon's surface, as this new work suggests.
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