New method suggests the Moon once had an internal magnetic field

New research suggests the Moon once had an internal magnetic field.

Unlike the earth, the Moon no longer has a core-generated magnetic field today. 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 dynamo on a bicycle, which converts mechanical motion into electrical energy.

“Today, there is an o...