‘Roaming’ Magnetic Fields Found

Weak magnetic fields are roaming across the universe, according to a new study that may have solved the mystery of where the huge magnetic fields around galaxies come from. Galaxies such as our Milky Way have their own large-scale magnetic fields. Although these fields are weak compared to planetary fields, scientists think the galactic versions help establish rates of star formation, guide cosmic rays, and regulate the dynamics of interstellar gas. Most scientists believe the stronger magnetic fields of today’s adult galaxies grew from weaker seed fields. But it’s unclear where these older fields originated