Unlike the Earth the Moon lacks a global magnetic field (though it does still have a field of sorts) but evidence from rocks brought back by the Apollo missions shows that this was not always the case. We haven’t seen an article on planetary magnetism from the ICR in some time now, but they used to be quite common. Brian Thomas’ latest, The Moon’s Latest Magnetic Mysteries, breaks the silence.
The topic is a recent paper in PNAS, “Persistence and origin of the lunar core dynamo” – the paper is not open access, but a conference abstract on the same subject is available as is a Phys.org article. The methodology is quite interesting: Continue reading