Magnetism Steers Sun‑Like Stars’ Spin Across a Lifetime, Study Says

A high‑resolution magnetohydrodynamic simulation of solar‑type interiors on Japan’s Fugaku supercomputer shows sun‑like stars maintain a solar‑like rotation (equator speeds ahead of the poles) throughout their lifetimes, overturning a 45‑year theory of anti‑solar rotation and highlighting the dominant role of magnetic fields and turbulence; the model reproduces the Sun’s rotation and predicts the magnetic field weakens gradually with age, though direct observations remain challenging.