What is the primary explanation for why the Moon lacks a large iron core compared to Earth?
Answer
Most of Theia's metallic core likely sank into the Earth’s core.
The differential composition is explained by the energetic merger, where the majority of the iron from Theia's core sank into the proto-Earth’s core, leaving the ejected mantle material to form the iron-depleted Moon.
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What was Theia like? - YouTube
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