Approximately how wide is the sphere that constitutes a magnetar?
Answer
About 12 miles across
Despite possessing magnetic fields of unparalleled magnitude, the physical dimensions of a magnetar are extremely small. A magnetar is characterized as a sphere measuring only about 12 miles across. This size reflects the intense compression experienced during the core collapse of a massive star that results in a neutron star remnant. The density achieved in such a small volume, combined with the extreme magnetic field penetrating its structure, creates conditions of unparalleled physics where magnetic pressure can rival or exceed gravitational forces holding the star together.
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