The Event Horizon Telescope (EHT) collaboration releases the first image showing how light is polarized at the edge of a black hole. The swirling, striated articulations around Messier 87’s supermassive black hole map magnetic fields that extend more 100,000 light-years from the object. The imaging resolution required ”is equivalent to that needed to measure the length of a credit card on the surface of the Moon,“ write the researchers.