Did the Moon ever have a strong magnetic field? Here’s what modern geophysics tells us

Did the Moon ever have a strong magnetic field? Here’s what modern geophysics tells us


Bordering Earth is a strong magnetic subject created by swirling liquid iron in the planet’s main. Earth’s magnetic field may be nearly as previous as the Earth alone – and stands in stark contrast to the Moon, which totally lacks a magnetic subject right now.

But did the Moon’s core deliver a magnetic area in the previous?

In the 1980s, geophysicists learning rocks introduced back again by Apollo astronauts concluded the Moon after experienced a magnetic industry that was as robust as Earth’s. But a robust magnetic area involves a electric power source, and the Moon’s main is reasonably small. For decades, experts have struggled to resolve this conundrum: how could these a modest core build a sturdy magnetic subject?

I’m a professor of geophysics and have been studying Earth’s magnetic subject for much more than 30 many years. I just lately assembled a team to use new scientific techniques to reexamine the evidence for lunar magnetization. We uncovered that the Moon did not in simple fact have a very long-lived magnetic industry. Not only does this locating modify the modern day comprehension of the Moon’s geologic historical past, it also has key implications for the presence of sources on the Moon that could be crucial to potential human exploration.