How Earth's previous moons collided to form the moon: New theory

ScienceDaily | 1/9/2017 | Staff
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The newly proposed theory by researchers Prof. Hagai Perets, of the Technion, and Weizmann Institute Profs. Raluca Rufo (lead author)and Oded Aharonson, runs counter to the commonly held "giant impact" paradigm that the moon is a single object that was formed following a single giant collision between a small Mars-like planet and the ancient Earth.

"Our model suggests that the ancient Earth once hosted a series of moons, each one formed from a different collision with the proto-Earth," said co-author Prof. Perets. "It's likely that such moonlets were later ejected, or collided with Earth or with each other to form bigger moons." To check the conditions for the formation of such mini-moons or moonlets the researchers ran 800 simulations of impacts with Earth.

Model - Science - Understanding - Formation - Earth

The new model is consistent with science's current understanding of the formation of Earth. In its last stages of the growth, Earth experienced...
(Excerpt) Read more at: ScienceDaily
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