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🌑 Moon's Origin Hypothesis: The Moon formed after a Mars-sized object named Theia slammed into the early Earth, spraying material into space.
🔬 New Chemical Evidence: A study in the journal Science suggests Theia originated in the inner solar system, close to where Earth formed.
🧪 Shared Composition: Scientists found remnants of Theia in Earth's rocks, meteorites, and moon matter, showing Theia and early Earth were built from similar construction materials.
🔄 Similar Chemistry: This explains why the chemistry of moon rocks is so similar to Earth's: Theia's impact on a chemically similar Earth made the two bodies resemble one another.
🎱 Planetary Formation Context: The early planet-making era "resembles a vast cosmic billiard game," with many big impacts, though they eventually dropped off.
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