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flag A new study reveals Theia, the planet that formed the Moon, likely came from the inner Solar System near Earth.

flag A new study in Science finds that Theia, the Mars-sized body that collided with early Earth to form the Moon, likely originated in the inner Solar System, closer to the Sun than Earth. flag By analyzing iron, molybdenum, and zirconium isotopes in lunar and terrestrial rocks, researchers discovered that Earth and the Moon share nearly identical chemical signatures, matching non-carbonaceous meteorites from the inner Solar System. flag This suggests Theia formed in a similar region, explaining the compositional similarity. flag The findings support the idea that Theia may have drifted outward before impact, helping clarify the Moon’s origin and the early evolution of the Earth-Moon system.

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