The Apollo 15 moon rock sample, which was analyzed by MIT and Rutgers University researchers, consists of basalt fragments welded together by a dark glassy matrix that was produced by melting from a meteorite impact. The black scale cube is 1 centimeter across. Credit: NASA
Findings suggest 2 mechanisms may have powered the moon’s ancient churning, molten core. New evidence from ancient lunar rocks suggests that an active dynamo once churned within the molten metallic core of the moon, generating a magnetic field that lasted at least 1 billion years longer than previously thought. Dynamos are natural generators of magnetic fields around terrestrial bodies, and are powered by the churning of conducting fluids within many stars and planets...
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