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Lunar dynamo’s lifetime extended by at least 1 billion years

9 Aug 2017, 17:59 UTC
Lunar dynamo’s lifetime extended by at least 1 billion years Hernán Cañellas (provided by Benjamin Weiss)

New evidence from ancient lunar rocks suggests that an active dynamo once churned within the molten metallic core of the moon, generating a magnetic field that lasted at least 1 billion years longer than previously thought. Dynamos are natural generators of magnetic fields around terrestrial bodies, and are powered by the churning of conducting fluids within many stars and planets.

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