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A lunar magnetic field may have lasted for only a short time

Apollo-era samples suggest that any lunar magnetosphere endured no more than 500 million years

Moon

Earth’s moon has been unprotected by a magnetic field for at least 4 billion years, a new study suggests.

T. Pesquet/ESA, NASA

By Carolyn Gramling

- More than 2 years ago

A lunar magnetic field may not have just been short-lived; it may have persisted for only a blip in geologic time, a new study finds.