Fra Mauro

Crater, Location, Apollo 14, & Facts

Oct 11, 2023 - 01:55
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Moon rock; Apollo 14Moon rock; Apollo 14

Fra Mauro, crater on the Moon that appears to be heavily eroded; it was named for a 15th-century Italian monk and mapmaker. About 80 km (50 miles) in diameter, Fra Mauro lies at about 6° S, 17° W, in the Nubium Basin (Mare Nubium) impact structure.

The name is also applied to the extensive surrounding region, called the Fra Mauro Formation, which lunar scientists interpret to be material ejected from the impact that formed the giant Imbrium Basin (Mare Imbrium) to the north—the largest impact basin (mare) on the Moon’s near side. A broad, shallow valley within the formation about 50 km (30 miles) north of Fra Mauro crater served as the site of the Apollo 14 lunar landing in February 1971. On two separate Moon walks, Apollo astronauts Alan Shepard and Edgar Mitchell collected samples of what was believed to be ejected rock; in later radiometric analysis on Earth, this material was found to have been thermally shocked about 3.9 billion years ago, presumably by the cataclysmic event that created Imbrium.

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