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It is widely believed in the scientific community that the magnetic field was created in the same way as the Earth's via a dynamo process, in which the spinning and churning of conductive liquid metal within the core of a rocky planet creates a magnetic field. However, scientists have been puzzled about how such a tiny planetary body could have maintained a long-lasting magnetic field.surface that testify to the existence of an ancient dynamo has also been questioned.
According to the scientists, the results of their work "bode well for research stemming from other sample-return missions from space, since any magnetic contamination acquired during flight or on Earth can likely be easily removed," said aflights. They used a magnet to expose the samples for two days to a field intensity of roughly 5 millitesla - about 100 times greater than the Earth's magnetic field - to mimic the length of a return voyage from the moon.
“As a global community, we’re starting to send more sample-return missions to other bodies, so it’s good to know that as long as we’re careful to ensure spacecraft fields are not too high – and it doesn’t have to be zero, necessarily – we can still do paleomagnetism studies along with other research,” said Sonia Tikoo, an assistant professor of geophysics at the Stanford Doerr School of Sustainability and the lead author of the study.
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