How Did The Moon Form? Scientists Finally Solve Pesky Problem With Giant Impact Hypothesis

April 9, 2015 6:36 PM

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How Did The Moon Form? Scientists Finally Solve Pesky Problem With Giant Impact Hypothesis

Scientists have long believed that the moon formed from debris created when a Mars-sized object crashed into Earth about 4.5 billion years ago. But there's one very big problem with this so-called giant impact hypothesis.

If the moon indeed formed from the collision between Earth and another object, why is the moon a near chemical match to our planet? Shouldn't it contain chemically distinct remnants of that other object too?

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