New Model Reconciles the Moon’s Earth-Like Composition With the Giant Impact Theory of Formation
ScienceDaily (Oct. 17, 2012) — The giant impact believed to have formed the Earth-Moon system has long been accepted as canon. However, a major challenge to the theory has been that Earth and Moon have identical oxygen isotope compositions, even though earlier impact models indicated they should differ substantially. In a paper published October 17 in the journal Science online, a new model by Southwest Research Institute (SwRI), motivated by accompanying work by others on the early dynamical history of the Moon, accounts for this similarity in composition while also yielding an appropriate mass for Earth and the Moon.
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New Model Reconciles the Moon’s Earth-Like Composition With the Giant Impact Theory of Formation

ScienceDaily (Oct. 17, 2012) — The giant impact believed to have formed the Earth-Moon system has long been accepted as canon. However, a major challenge to the theory has been that Earth and Moon have identical oxygen isotope compositions, even though earlier impact models indicated they should differ substantially. In a paper published October 17 in the journal Science online, a new model by Southwest Research Institute (SwRI), motivated by accompanying work by others on the early dynamical history of the Moon, accounts for this similarity in composition while also yielding an appropriate mass for Earth and the Moon.

Continue Reading