Testing of the samples brought back by Chang'e-5, which were mostly basalt, showed that the moon had a magnetic field of between 2,000 to 4,000 nanoteslas approximately 2 billion years ago, which ...

The ancient strength of the lunar magnetic field recorded by the Chang'e-6 basalt clasts reveal the existence of a relatively active lunar dynamo at 2.8 Ga. Credit: Zhang Min, Qi Kaixian, and Shi ...