Approximately 4.5 billion years ago, a Mars-sized planet called Theia collided with early Earth, ejecting molten debris into space that was pulled together by gravity to form Earth's moon, which represents a piece of Earth's ancient past.
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When a Planet Smashed Into Earth #astronomy #shorts追加:
4 and a half billion years ago, early Earth was a violent molten world. A Mars-sized planet called Thea slammed into Earth, ejecting molten debris into space. Gravity pulled the debris together, forming a molten moon in orbit.
What remained became our moon, Trey, a piece of Earth's ancient past.
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