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Coverage dated September 23, 2026

The far side of the moon provides clues to a past magnetic field

Headline from Phys

Unlike Earth, the moon no longer has a core-generated magnetic field. On our planet, the movement of liquid iron in the outer core generates a global magnetic field. This so-called geodynamo works on a similar principle to a bicycle dynamo, which converts mechanical motion into electrical energy.

Phys's own description from its feed. We collect headlines and these descriptions, not full articles; read the original reporting below.

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2 articles, oldest first.

  1. Phys

    The far side of the moon provides clues to a past magnetic field (opens Phys)

    Published

    Phys's feed description

    Unlike Earth, the moon no longer has a core-generated magnetic field. On our planet, the movement of liquid iron in the outer core generates a global magnetic field. This so-called geodynamo works on a similar principle to a bicycle dynamo, which converts mechanical motion into electrical energy.

  2. Gizmodo

    A Strange Rock on the Moon’s Far Side May Help Solve a Decades-Old Magnetic Mystery (opens Gizmodo)

    Published

    Gizmodo's feed description

    If true, it means our satellite once had its own magnetic field—and lost it over the course of astronomical history.

The far side of the moon provides clues to a past magnetic field | Since Then