This artist’s concept depicts magnetar 1E 1547.0-5408, a rapidly rotating neutron star with magnetic fields over a trillion times stronger than Earth’s. The upper and lower emission cones show X-ray polarization degrees of 40% and 80%, respectively. These super magnetic neutron stars offer glimpses into the physics of intense environments that cannot be found anywhere else. The IXPE mission’s ability to measure X-ray polarization was essential to test this theory. This finding exemplifies how neutron stars enable us to test fundamental physics in environments not replicable in labs on Earth.”