A giant impact is one of the most popular theories about how Earth and its moon were formed. Scientists at the University of Chicago and the University of Leeds analyzed the dynamics of fluids and concluded that Earth must have been magnetized before or after the impact.
They claim that this will help to narrow down the theories of the Earth-moon formation. Their work is in a journal.
The theory of the Earth's magnetic field can tell us something about the formation of the Earth-moon system according to Professor David Hughes. This seems somewhat surprising and previous theories didn't recognize the connection.
The assessment is based on the resilience of the Earth's magnetic field, which is maintained by a fluid in the outer core.
The Earth's magnetic field can maintain a strong one but not amplify it, according to Professor Fausto Cattaneo.
If Earth's field were to be switched off, the scientists concluded that it wouldn't be able to kick in again.
Professor Cattaneo said that the feature allowed them to make deductions about the history of the early Earth.
Professor Hughes wondered where the Earth's magnetic field came from. Our hypothesis is that it got to this strange state before or after the impact. Magnetic field evolution is required for any realistic model of the formation of the Earth– moon system.
The Earth-Moon system was formed. The National Academy of Sciences published new insights from thegeodynamo. 10.1073/pnas.
Journal information: Proceedings of the National Academy of Sciences
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