CLAUS LUNAU / SCIENCE PHOTO LIBRARY CLAUS LUNAU / SCIENCE PHOTO LIBRARY
Earth's magnetic field. Illustration of the magnetic field (blue lines) surrounding the Earth. This magnetic field is generated by eddies set up in the liquid core. The Earth's magnetic field extends outwards into space for tens of thousands of kilometres, protecting the planet from high-energy radiation from the Sun. This view shows the Earth's southern hemisphere.
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