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A magnetar star has been spotted violently erupting and ejecting as much energy as one billion suns within a tenth of a second.
The star, which has been dubbed a 'cosmic monster', is roughly 13 million light years away in the Sculptor group of galaxies.
During the eruption, the magnetar released the energy equivalent to that produced by the Sun in 100,000 years, according to researchers led by the University of Valencia.
Magnetars are a subcategory of neutron stars - objects that can contain up to half a million times the mass of Earth in a diameter of just 12.4 miles - with extremely intense magnetic fields.
The objects suffer violent eruptions, but as these last just a fraction of a second, it has been difficult to detect and study them.