Proxima Centauri, the closest star to the Sun, hosts at least two planets: Proxima b and Proxima d. Using high-resolution optical observations, astronomers searched for signs of magnetic interactions between the star and its planets. They measured the star’s rotation period as about 85 days and found that Proxima Centauri experiences frequent flares, with about 5 percent of the observing time showing flare activity. Statistical analysis revealed that many of these flares are phase-locked to th...