First Direct Evidence of Collision That Formed Moon

Newly analyzed lunar rocks have revealed the first direct evidence of the ancient smashup that created the moon, bolstering a long-held theory.

Theia smashes Earth

The rocks were gathered by astronauts on NASA’s Apollo missions. But newer scanning electron microscopes have now allowed scientists to detect in them the first chemical traces of the Mars-size planet thought to have blasted the proto-Earth around 4.5 billion years ago.

When the ancient planet, Theia, smashed into Earth, it blasted debris into space. The moon formed out of that debris. If the moon formed predominantly from the fragments of Theia, as predicted by most numerical models, the Earth and Moon should differ. This new analysis has provided evidence of this difference. Learn more here.

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One Response to “First Direct Evidence of Collision That Formed Moon”

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