When Muni Zhou looks into a clear night sky, she might be focusing less on the stars and more on what cannot be seen with the eye. The MIT graduate student, now in her fourth year at the Plasma Science and Fusion Center (PSFC), is fascinated by vast magnetic field structures that exist not only around planets like Earth, but beyond the heliosphere to the edges of the universe. How these cosmic magnetic fields originated and evolved is the longstanding theoretical puzzle she is helping to solve. Zhou’s interest…