The sun is a dynamic and powerful star that constantly emits energy and particles, creating a complex space weather environment that directly impacts Earth and other planets. Scientists use a fleet of specialized satellites to study the sun's magnetic cycles, solar flares, and coronal mass ejections, which can energize particles in Earth's radiation belts and pose hazards to spacecraft and astronauts. By understanding these solar phenomena, researchers can better protect our planet and its technological infrastructure from the effects of space weather.