blog posts Astronomers image magnetic fields at the edge of a black hole Mar 24, 2021 9:00 am by Illinois Center for Advanced Studies of the UniverseResearch Share on Facebook Tweet Email Images The Event Horizon Telescope collaboration has revealed how a black hole looks in polarized light. This is the first time astronomers have been able to measure polarization, a signature of magnetic fields, this close to the edge of a black hole. Share on Facebook Tweet Email