A recent report by scientists reveals that lunar rocks gathered by Apollo astronauts over 50 years ago are offering new insights into the moon’s enigmatic magnetic field. The University of Oxford researchers in England have highlighted that the moon’s magnetic field, historically weak, experienced episodes of significant strength surpassing Earth’s magnetic activity around three to four billion years ago, as published in the journal Nature Geoscience.
The study suggests that the moon had brief spikes in high magnetic field intensity lasting up to 5,000 years, likely due to the melting of titanium-rich rocks deep within its core. This new information challenges previous assumptions about the moon’s magnetic field strength, which were primarily based on Apollo mission rock samples. The upcoming Artemis program, set to send astronauts to the moon’s south polar region, is expected to provide further data on the ancient magnetism of the moon by examining different rock formations.
Lead author Claire Nichols emphasized the importance of understanding the moon’s magnetic shield in relation to planetary habitability. The research team discovered a correlation between high titanium levels in the lunar rocks and preserved evidence of intense magnetic activity, indicating a previously unknown link. Future Artemis missions aim to explore rocks near the south pole, where water ice may be present in permanently shadowed craters. This exploration could offer valuable insights into the moon’s geological and magnetic history.