The internal structure of the Moon, from surface to core, preserves a record of its evolution from accretion to present-day. The structure of the Moon is unique in the Solar System by virtue of its small core radius relative to its planetary radius, plagioclase-rich crust, and highly heterogeneous crustal distribution of heat producing elements. This bulk structure is largely a consequence of the accretion of the Moon from a circum-terrestrial impact-generated debris disk, and its subsequent differentiation from a magma ocean. However, the present-day Moon exhibits strong departures from the simple spherically symmetric stratified interior expected at the end of...

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