Earth's moon could have formed in just 5 hours after giant impact

One day in history about 4.5 billion years ago was a dramatic one for Earth, potentially giving our planet an instant moon and an almighty headache all in one go. The moon could have formed in a matter of hours following the giant impact between Earth and a Mars-size protoplanet early in the history of the solar system [1].

Sources

1. space.com · Earth's moon could have formed in just 5 hours after giant impact Sep 7, 2026

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