What Is a Magnetic Field?

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9. The Universes Most Powerful Magnet

The most powerful magnet that we know of is the Soft Gamma Repeater 1806-20. You won’t see this magnet anywhere on Earth because it is a kind of star known as a magnetic neutron star, or magnetar. It has a magnetic field of 100 billion Teslas.

For comparison, our entire planets magnetic field measures in at only 0.00005 of a single Tesla. For some perspective, that is enough magnetism to slow down a speeding locomotive from a distance of around a quarter of a million miles away. Only 10 of these objects have been discovered in the universe so far.

Magnetic Field

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