Astronomers directly measure solar-system-sized corona around distant supermassive black hole

Astronomers directly measured a solar-system-sized corona around a distant supermassive black hole for the first time. This measurement was made possible by a rare cosmic alignment, using a foreground galaxy as a cosmic magnifying glass to sharpen the view of the black hole's surroundings. The technique offers a new way to study black hole environments and magnetic fields, previously too small to resolve with telescopes.