‘Cosmic monster’ star spits energy with the force of a billion suns

A dense, magnetic star violently erupted and spat out as much energy as a billion suns — and it happened in a fraction of a second, scientists recently reported.

This type of star, known as a magnetar, is a neutron star with an exceptionally strong magnetic field, and magnetars often flare spectacularly and without warning. But even though magnetars can be thousands of times brighter than our sun, their eruptions are so brief and unpredictable that they’re challenging for astrophysicists to find and study.