Massive space rock impact could have ‘instantly’ created the moon

The simulation screenshot shows a stream of ejected material created by a giant impact coalesces into the body that would become the moon.
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A giant impact may have quickly thrown the moon into orbit around Earth instead of creating a disk of debris from which the moon gradually formed over time, new research suggests.

A highly detailed computer simulation created by Durham University’s Institute for Computational Cosmology revealed this alternate origin story for Earth’s lunar companion. This new, aptly named “immediate satellite scenario” would mean that the proto-moon was less molten during its formation and would suggest that much of the moon formed immediately after a giant impact on Earth.

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