What is a gyrocompass?
A gyrocompass, invented in the early 1900s, uses a spinning wheel to find true north and isn't affected by magnetism, which makes it useful on steel ships.
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Magnetism Facts
Magnetism facts and facts about magnetisms, from the Random Facts shelf.
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Which planet has the strongest magnetic field?
Jupiter has the strongest magnetic field of any planet.
How strong are MRI magnets?
MRI magnets are thousands of times stronger than Earth's magnetic field.