Magnetars are neutron stars that have an enormous amount of magnetic fields. The magnetic fields recorded from these celestial objects are at a range of 108 to 1011. To put this in perspective the Earth has a geomagnetic field of 30–60 microteslas and these magnetic fields are hundreds of millions of times stronger than any man-made magnet. These strong fields exist due to a magnetohydrodynamic dynamo process in the conducting fluid that exists before the neutron star settles into its equilibrium configuration. These fields exist at an intermediate depth within the neutron star due to persistent currents in a proton-superconductor phase of matter. Just like any other neutron star its total diameter is only 20 kilometers but has a mass 2-3 times as that of our sun but its active life is much shorter as well as the strong magnetic fields decay after about 10,000 years. The magnetic field of a Magnetar would be lethal even at a distance of 1000 km due to the strong magnetic field distorting the electron clouds of the subject's constituent atoms, rendering the chemistry of life impossible.

 

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