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Moon formation

Earth's titanium twin

A giant impact on the young proto-Earth is thought to explain the formation of the Moon. High-precision analysis of titanium isotopes in lunar rocks suggests that the Moon and Earth's mantle are more similar than existing models permit.

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Figure 1: Earthrise as observed from the KAGUYA spacecraft in orbit around the Moon.



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Correspondence to Matthias M. M. Meier.

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Meier, M. Earth's titanium twin. Nature Geosci 5, 240–241 (2012).

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