Is the Earth a magnet?
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The reasons for the Earth's magnetism are not really understood, but it is thought to be due to the movement of electrical charges around the Earth's core, which is probably mostly made up of iron.
The Earth's magnetic field extends out into space. The Sun and the other planets in the Solar System also have magnetic fields. Some distant stars are known to have exceptionally powerful magnetic fields.
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Date Added: 13 December '11
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