The far side of the Moon provides clues to a previous magnetic field

A recent study analyzed data from the European Space Agency's Smart Lander for Investigating Moon (SLIM) mission, which impacted the Moon's far side in 2019. The mission aimed to test a new lunar lander technology and gather data on the Moon's magnetic field. Researchers found that the lunar regolith on the far side of the Moon contains a high concentration of iron, which suggests that the Moon had a global magnetic field in the distant past. This is supported by the presence of magnetic minerals, such as magnetite, which is a type of iron oxide. The study also found that the magnetic minerals are not evenly distributed, indicating that the magnetic field was likely not uniform and may have varied in strength and orientation over time. The findings provide new insights into the Moon's geological history and the evolution of its magnetic field.