Moon Derives From Earth, Space Object, Study Says

Publication: National Geographic News   Date: August 11, 2003   View Article

Science has a better understanding of how and when the moon came to be thanks to a team of German geochemists who compared ratios of trace elements in rocks from the Earth, the moon, Mars, and meteorites.

Most astronomers subscribe to the so-called “cratering” theory to explain the moon’s creation: Billions of years ago, a Mars-sized body slammed into Earth, projecting a mixture of rocky debris into space, some of which lumped together to form the moon. The remaining debris rained back down on Earth.

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