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    A Cosmic Crash May Have Made the Moon

    by Sean Raymond Sep 16, 2016 3 minutes

    Let There Be Moon: Artist’s rendition of the moon-forming impact between Earth and Theia, a proto-planet.Hagai Perets

    Some marriages are arranged. Some are for love, others for convenience. Some happen as the result of a sextillion-ton collision in space. The Earth and the moon, for example.

    Over the past twenty years there has been one dominant model to explain the origin of the moon: the . The Earth is thought to have formed by a succession of collisions with moon- to Mars-sized “planetary embryos”, the building blocks of planets. The giant

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