Magnetic fields of Mars and Saturn

It is thought planets have dynamos in their centre. This explains the intensity and geometry of the magnetic fields found on the surface. The dynamo is in the form of a fluid sphere of molten iron which is churning around producing electric currents and magnetic fields. But Mars has a strange field. Only the southern hemisphere has a strong magnetic field, emanating from the crust. Secondly, this crustal field is very strong, about ten times what’s found on Earth or other rocky planets. This is one of a range of amazing anomalies with Mars. Saturn has other problems. Its fields are too perfect. Sabine Stanley explains.

From: http://www.abc.net.au/rn/scienceshow/stories/2010/2881442.htm

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