The Moon’s isotopic composition is uncannily similar to Earth’s. This may be the signature of a magma ocean on Earth at the time of the Moon-forming giant impact, according to numerical simulations.
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Melosh, H.J. Why the Moon is so like the Earth. Nat. Geosci. 12, 402–403 (2019). https://doi.org/10.1038/s41561-019-0364-0
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DOI: https://doi.org/10.1038/s41561-019-0364-0
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