![]() ![]() ![]() It’s billions of years old and recently discovered data suggests that it was at one point as strong as Earth’s. Mercury’s magnetic field is 100 times weaker than Earth’s. ![]() So, how are other planetary magnetic fields generated?Įarth and Mercury are the only planets in our system whose magnetic fields are generated by the movement of liquid metal at their cores. The other planets in our solar system, except for Venus and Mars, all have magnetic fields or traces of magnetism that differ from Earth’s in various ways. Earth’s magnetic field is generated by liquid metal at the core and Earth’s rapid rotation of 24 hours generates enough movement of the liquid to stimulate a magnetic field. Magnetic fields are generated by the movement of magnetic material located inside the planet, usually at the core. The particles from the sun are charged, which means they respond to the magnetic field and move around it. Magnetic fields protect planets and atmospheres from solar particles. ![]()
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