Difficulties
This lunar origin hypothesis has some difficulties that have yet to be fully resolved. For example, the giant impact hypothesis implies that a surface magma ocean would have formed following the impact. Yet there is no evidence that the Earth ever had such a magma ocean and it is likely there exists material that has never been processed by a magma ocean.
Read more about this topic: Giant Impact Hypothesis
Famous quotes containing the word difficulties:
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“Have you noticed when reading War and Peace the difficulties Tolstoy experienced in forcing morally wounded Bolkonsky to come into geographical and chronological contact with Natasha? It is very painful to watch the way the poor fellow is dragged and pushed and shoved in order to achieve this happy reunion.”
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