Titanium Isotopes Provide Clues to Lunar Origin

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Titanium Isotopes Provide Clues to Lunar Origin
The Moon may have formed by the impact of a
Mars-sized object with Earth. Planetary
accretion models suggest that the impactor and
Earth would have had different isotopic
compositions but titanium has the same
isotopic composition in both Earth and Moon. The
dynamics of planet formation and of the giant
impact need a closer look.