Scientists may have found the planet that made the Moon
SMRTR summary
Scientists analyzed iron isotopes in Moon rocks from Apollo missions to reconstruct the composition and origin of Theia, the ancient planet that collided with Earth 4.5 billion years ago to create the Moon. Their findings suggest Theia formed closer to the Sun than Earth did in the inner Solar System, making the two planets likely neighbors before their catastrophic collision.
SMRTR provides this summary for quick context. The original article belongs to Science Daily.
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