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==Description== | ==Description== | ||
Little is known about the physical structure of a magnetar because they are difficult to study due to inherent dangers from [[ | Little is known about the physical structure of a magnetar because they are difficult to study due to inherent dangers from [[Gamma Ray Burst]]s. Magnetars are around 20 kilometres (12 mi) in diameter but are more massive than [[Sol]]. The density of a magnetar is such that a thimbleful of its material would weigh over 100 million tons on Earth. Magnetars also rotate rapidly, with most magnetars completing a rotation once every 1-10 seconds. The active life of a magnetar is short. Their strong magnetic fields decay after about 10,000 years, after which activity and strong X-ray emission cease. Given the number of magnetars observable today, one estimate puts the number of inactive magnetars in the [[Milky Way Galaxy]] at 30 million or more. | ||
Quakes triggered on the surface of the magnetar cause great volatility in the star and the magnetic field which encompasses it, often leading to extremely powerful Gamma Ray Flare emissions which have been recorded. | Quakes triggered on the surface of the magnetar cause great volatility in the star and the magnetic field which encompasses it, often leading to extremely powerful [[Gamma Ray Flare]] emissions which have been recorded. | ||
==Magnetic Field== | ==Magnetic Field== | ||
Magnetars are primarily characterized by their extremely powerful magnetic field, which can often reach the order of ten [[Tesla|gigatesla]]s. These magnetic fields are hundreds of thousands of times stronger than any man-made magnet, and quadrillions of times more powerful than Earth's magnetic field. They are currently the most magnetic objects ever detected in the universe. | Magnetars are primarily characterized by their extremely powerful magnetic field, which can often reach the order of ten [[Tesla|gigatesla]]s. These magnetic fields are hundreds of thousands of times stronger than any man-made magnet, and quadrillions of times more powerful than Earth's magnetic field. They are currently the most magnetic objects ever detected in the universe. |