Diffuse puffs of “missing” matter surround most galaxies
An MIT-led team used bright radio bursts to illuminate a vast source of matter that was previously unaccounted for.
Scientists have discovered diffuse clouds of "missing" matter surrounding most galaxies, using fast radio bursts (FRBs) as a tool to probe the universe. For decades, researchers have struggled to explain the discrepancy between the estimated amount of ordinary matter in the early universe and the amount of visible matter found in stars and galaxies today. Now, a team led by MIT has developed a method to search for missing matter by analyzing the smearing of FRB signals as they pass through space.